BSS Clear Codes NSN

Dec DX cause

80 ext_in_ul_quality_c

81 ext_in_ul_strength_c

82 ext_in_dl_quality_c

83 ext_in_dl_strength_c

84 ext_in_distance_c

85 ext_in_o_and_m_inter_c

86 ext_in_resp_to_msc_invoc_c

87 ext_in_better_cell_c

88 ext_in_directed_retry_c

89 ext_in_unexpected_c

90 ext_in_switch_crc_pool_c

91 ext_in_pre_empt_c

92 ext_in_bsc_trho_c

93 ext_in_isho_c

100 ext_out_dl_rxlev_c

101 ext_out_ul_rxlev_c

102 ext_out_dl_rxqual_c

103 ext_out_ul_rxqual_c

104 ext_out_dl_interf_c

105 ext_out_ul_interf_c

106 ext_out_distance_c

107 ext_out_pbgt_ho_c

108 ext_out_umbrella_ho_c

109 ext_out_forced_ho_c

110 ext_out_dr_ho_c

111 ext_out_tr_ho_c

112 ext_out_idr_ho_c

113 ext_out_pre_empt_ho_c

114 ext_out_rap_fld_drop_c

115 ext_out_low_distance_c

116 ext_out_switch_crc_pool_c

117 ext_out_slow_moving_ms_c

118 ext_out_det_slow_mov_ms_c

119 ext_out_det_fast_mov_ms_c

120 inter_dl_rxlev_c

121 inter_ul_rxlev_c

122 inter_dl_rxqual_c

123 inter_ul_rxqual_c

124 inter_dl_interf_c

125 inter_ul_interf_c

126 inter_distance_c

127 inter_pbgt_ho_c

128 inter_umbrella_ho_c

129 inter_forced_ho_c

130 inter_dr_ho_c

131 inter_tr_ho_c

132 inter_idr_ho_c

133 inter_pre_empt_ho_c

134 inter_rap_fld_drop_c

135 inter_low_distance_c

136 inter_ok_ci_ratio_c

137 inter_bad_ci_ratio_c

138 inter_slow_moving_ms_c

139 inter_det_slow_mov_ms_c

140 intra_dl_interf_c

141 intra_ul_interf_c

142 intra_forced_ho_c

143 intra_dl_rxqual_c

144 intra_ok_ci_ratio_c

145 intra_bad_ci_ratio_c

146 intra_pre_empt_ho_c

147 intra_distance_c

148 intra_low_distance_c

149 intra_dr_ho_c

150 intra_direct_access

151 intra_gprs_ho_c

152 intra_ho_to_amr_hr_c

153 intra_ho_to_amr_fr_c

154 intra_inter_band_tch_c

155 intra_inter_band_sdc_c

156 inter_det_fast_mov_ms_c

157 inter_erfd_ho_c

158 inter_direct_access_c

159 inter_bsc_trho_c

160 inter_dadlb_c

163 ext_out_erfd_ho_c

164 ext_out_bsc_trho_c

166 intra_inter_bts_type_tch_c

167 intra_inter_bts_type_sdc_c

168 intra_ho_due_to_hscsd_c

169 intra_inter_band_due_lev_c

190 ext_out_isho_c

300 user_act_block_c

301 netw_act_block_c

302 bts_fail_block_c

303 lapd_fail_block_c

304 abis_fail_block_c

305 abis_msg_corrup_to_bts_ c

306 ass_fail_msg_c

307 block_slave_c

308 ch_act_nack_c

309 ch_act_nack_om_inter_c

310 ch_act_nack_equip_fail_c

311 ch_act_nack_encryp_alg_c

312 ch_act_nack_rad_ch_alr_a_c

313 ch_act_nack_serv_not_ava_c

314 ch_act_fail_c

315 conn_fail_c

316 conn_fail_rad_inf_fail_c

317 conn_fail_rad_link_fail_c

318 conn_fail_rem_trans_fail_c

319 data_ind_corrup_c

320 err_ind_c

321 estab_ind_fail_c

322 estab_conf_fail_c

323 ho_fail_c

324 ho_detect_fail_c

325 mode_mod_nack_c

326 mode_mod_ack_fail_c

327 no_meas_result_c

328 no_resp_from_copro_c

329 phy_cont_conf_fail_c

330 rcs_alg_start_ack_fail_c

331 rcs_alg_cl_ack_fail_c

332 rc0_disco_ind_c

333 rf_ch_rel_ack_fail_c

334 rel_ind_c

335 rel_ind_fail_c

336 signalling_error_c

337 state_confligt_c

338 type_confligt_c

339 forced_rel_c

340 rej_phantom_res_c

341 overload_c

342 abi_switchover_c

343 sapi_3_fail_c

344 paging_msg_fail_c

345 ch_required_fail_c

346 mode_mod_nack_equip_fail_c

347 mode_mod_nack_trc_rat_un_c

348 rrm_serv_req_nack_c

349 ch_mode_mod_fail_c

350 ass_fail_c

351 dr_fail_c

352 coprocess_fail_c

353 err_rep_enc_alg_not_imp_c

354 error_report_c

355 ch_act_nack_ch_mode_err_c

356 ch_act_nack_gen_ie_err_c

357 speech_version_unavail_c

358 ignored_double_rand_acc_c

359 rtsl_reconf_fail_c

360 ho_interrupted_c

361 downgrade_c

362 ho_not_started_c

363 conf_change_not_allowed_c

364 conf_change_bts_fail_c

365 conf_change_ms_fail_c

366 hscsd_copro_fail_c

367 sub_timer_c

368 forced_ho_block_c

369 upgrade_fail_c

370 estab_ind_corrupted_c

400 timing_advance_c

401 rrm_switch_crc_pool_c

402 rrm_speech_ver_unavail_c

403 rrm_bts_not_supporting_c

404 rrm_ms_not_supporting_c

405 rrm_invalid_cell_c

500 ho_not_allowed_c

501 no_radio_res_avail_c

502 restore_old_c

503 no_resp_from_coprocess_c

504 no_resp_to_radio_res_req_c

505 has_state_confligt_c

506 clear_cmd_not_received_c

507 ms_is_lost_c

508 no_resp_to_ho_cpl_msg_c

509 has_switchover_c

510 target_fail_c

511 source_fail_c

512 has_call_control_c

513 adj_cell_id_err_c

600 aiv_hand_act_fail_c

601 aiv_ssp_c

602 sccp_conn_fail_c

603 sccp_conn_timeout_c

604 sccp_release_c

606 global_reset_c

608 no_dtap_from_msc_c

609 ho_denied_assign_c

610 ho_denied_ciphering_c

611 ho_denied_clear_c

612 ho_denied_no_sccp_conn_c

613 T7_expiry_c

614 T10_expiry_c

615 aiv_crct_res_timeout_c

616 aiv_crct_conn_timeout_c

617 aiv_crct_disconn_timeout_c

618 aiv_crct_rel_timeout_c

619 aiv_timeout_c

620 act_ctrl_timeout_c

621 invalid_bssmap_msg_c

622 unknown_a_pcm_c

623 ho_denied_no_proper_crc_c

624 ch_type_mismatch

625 aiv_transc_or_rate_unava_c

626 aiv_speech_version_unava_c

627 aiv_pagin_refus_big_load_c

628 aiv_conn_refresh_timeout_c

629 aiv_conn_refresh_failed_c

700 rc0_hand_act_fail_c

701 a_crct_alr_res_c

702 a_crct_conn_err_c

703 rc0_crct_conn_timeout_c

704 access_out_of_crct_tbl_c

705 a_crct_rel_err_c

706 rc0_transc_or_rate unava_c

707 rc0_cip_type_mismatch_c

708 rc0_inv_msg_contents_c

709 rc0_req_speech_ver_unava_c

710 rc0_hunting_queue_full_c

711 rc0_a_crct_congestion_c

712 rc0_a_search_error_c

713 rc0_crct_pool_mismatch_c

714 rc0_rej_due_eme_call_c

715 rc0_ilc_file_error_c

800 a_tsl_user_mismatch_c

801 sc7_crct_res_timeout_c

802 sc7_crct_conn_timeout_c

803 sc7_crct_disconn_timeout_c

804 sc7_crct_rel_timeout_c

805 a_tsl_blocked_c

806 a_tsl_status_unknown_c

807 lsi_access_fail_c

808 scc_access_fail_c

809 undef_tsl_in_lsi_c

810 crct_equipment_fail_c

811 reset_crct_c

813 sc7_ssp_c

815 a_pcm_fault_c

817 a_crct_removed_c

819 a_et_state_change_c

900 m_radio_if_mess_fail_c

901 m_radio_if_fail_c

902 m_uplink_quality_c

903 m_uplink_strength_c

904 m_downlink_quality_c

905 m_downlink_strength_c

906 m_distance_c

907 m_o_and_m_inter_c

908 m_resp_to_msc_invoc_c

909 m_call_control_c

910 m_r_if_f_rev_to_old_c

911 m_handover_succ_c

912 m_better_cell_c

913 m_directed_retry_c

914 m_equipment_fail_c

915 m_no_radio_res_avail_c

916 m_req_terr_res_unava_c

917 m_cch_overload_c

918 m_processor_overload_c

919 m_bss_not_equipped_c

920 m_ms_not_eqipped_c

921 m_tr_cod_rat_ad_unav_c

922 m_ciph_alg_not_supp_c

923 m_terr_chan_alr_allc_c

924 m_prot_err_b_bsc_msc_c

926 m_invalid_cell_c

927 m_invalid_msg_cont_c

928 m_ie_or_field_missing_c

929 m_incorrect_value_c

930 m_unknown_msg_type_c

931 m_unknown_ie_c

933 m_cip_type_mismatch_c

934 m_switch_circuit_pool_c

935 m_speech_version_unavail_c

936 m_pre_empt_c

937 m_traffic_c

BSSMAP cause HEX DEC

Uplink quality 2 2

Uplink strength 3 3

Downlink quality 4 4

Downlink strength 5 5

Distance 6 6

O and M intervention 7 7

Response to MSC invocation 8 8

Better cell C 12

Directed retry D 13

Used if the cause of incoming external handover is not recognised or not mentioned at all

Switch circuit pool 32 50

Preemption 29 41

Traffic F 15

Used if the incoming external handover is an inter–system handover


Uplink strength 3 3


Uplink quality 2 2


Uplink quality 2 2

Distance 6 6

Better cell C 12

Better cell C 12


Directed retry D 13


Directed retry D 13


Uplink strength 3 3

Distance 6 6


Better cell C 12

Better cell C 12

Better cell C 12


Uplink strength 3 3


Uplink quality 2 2


Uplink quality 2 2

Distance 6 6

Better cell C 12

Better cell C 12


Directed retry D 13


Directed retry D 13


Uplink strength 3 3

Distance 6 6



Better cell C 12

Better cell C 12


Uplink quality 2 2






Distance 6 6

Distance 6 6

Directed retry D 13


Traffic F 15

Better cell C 12

Better cell C 12

Traffic F 15

Traffic F 15

Better cell C 12

Better cell C 12


Traffic F 15

Traffic F 15

Better cell C 12

Traffic F 15

Traffic F 15

Traffic F 15

Traffic F 15


Traffic load 28 40



Equipment failure 20 32




Radio interface failure, rev to old ch A 10


Radio interface failure 1 1



Ciphering algorithm not supported 40 64

No radio resource available 21 33

Req transc/rate adaption unavail 30 48






Radio interface message failure 0 0






BSS not equipped 25 37














Preemption 29 41


CCCH overload 23 35






























Distance 6 6


Requested speech version unavailable 33 51


MS not equipped 26 38

Invalid cell 27 39

Call control 9 9










Call control 9 9

Call control 9 9

Call control 9 9

Invalid cell 27 39


Call control 9 9

Call control 9 9

Call control 9 9

Call control 9 9

Call control 9 9

Call control 9 9

Call control 9 9

Call control 9 9

Call control 9 9

Call control 9 9

Call control 9 9








Protocol error betw BSC and MSC 60 96

Req terrestrial resource unavail 22 34

Call control 9 9

Invalid message contents 51 81



Call control 9 9




Terr circuit already allocated 50 80








Requested speech version unavailable 33 51

Traffic load 28 40


Traffic load 28 40


Traffic load 28 40














Call control 9 9






Uplink quality 2 2

Uplink strength 3 3



Distance 6 6



Call control 9 9


Handover successful B 11

Better cell C 12

Directed retry D 13




CCCH overload 23 35

Processor overload 24 36


MS not equipped 26 38



Terr circuit already allocated 50 80

Protocol error betw BSC and MSC 60 96

Invalid cell 27 39


Information elem or field missing 52 82

Incorrect value 53 83

Unknown message type 54 84

Unknown information element 55 85

Circuit pool mismatch 31 49


Requested speech version unavail 33 51

Preemption 29 41

Traffic F 15

BSSMAP cause HEX DX cause

RADIO INTERFACE MESSAGE FAILURE 0x00 data_ind_corrup_c

estab_ind_fail_c

estab_conf_fail_c

ho_detect_fail_c

mode_mod_ack_fail_c

phy_cont_conf_fail_c

rel_ind_fail_c

rej_phanton_res_c

paging_msg_fail_c

ch_required_fail_c

ass_fail_c

ch_act_nack_gen_err_c

ignored_double_rand_acc_c

estab_ind_corrupted_c

clear_cmd_not_received_c

ms_is_lost_c

m_radio_if_mess_fail_c

RADIO INTERFACE FAILURE 0x01 ch_act_nack_c

conn_fail_c

conn_fail_rad_inf_fail_c

conn_fail_rad_link_fail_c

err_ind_c

no_meas_result_c

rf_ch_rel_ack_fail_c

rel_ind_c

signalling_error_c

sapi_3_fail_c

ch_mode_mod_fail_c

coprocess_fail_c

error_report_c

conf_change_ms_fail_c

m_radio_if_fail_c

UPLINK QUALITY 0x02 ext_out_ul_quality_c

ext_out_ul_rxqual_c

ext_out_ul_interf_c

inter_ul_rxqual_c

inter_ul_interf_c

intra_ul_interf_c

m_uplink_quality_c

UPLINK STRENGTH 0x03 ext_in_ul_strength_c

ext_out_ul_rxlev_c

ext_out_rap_fld_drop_c

inter_ul_rxlev_c

inter_rap_fld_drop_c

m_uplink_strength_c

DOWNLINK QUALITY 0x04 ext_in_dl_quality_c

ext_out_dl_rxqual_c

ext_out_dl_interf_c

inter_dl_rxqual_c

inter_dl_interf_c

inter_ok_ci_ratio_c

inter_bad_ci_ratio_c

intra_dl_interf_c

intra_dl_rxqual_c

intra_ok_ci_ratio_c

intra_bad_ci_ratio_c

m_downlink_quality_c

DOWNLINK STRENGTH 0x05 ext_in_dl_strength_c

ext_out_dl_rxlev_c

inter_dl_rxlev_c

intra_direct_access_c

inter_direct_access_c

intra_inter_band_due_lev_c

m_downlink_strength_c

DISTANCE 0x06 ext_in_distance_c

ext_out_distance_c

ext_out_low_distance_c

inter_distance_c

inter_low_distance_c

intra_distance_c

intra_low_distance_c

timing_advance_c

m_distance_c

O AND M INTERVENTION 0x07 ext_in_o_and_m_inter_c

ext_out_forced_ho_c

inter_forced_ho_c

intra_forced_ho_c

user_act_block_c

netw_acct_block_c

ch_act_nack_om_inter_c

abi_switchover_c

forced_ho_block_c

has_switchover_c

a_crct_removed_c

a_et_state_change_c

m_o_and_m_inter_c

RESPONSE TO MSC INVOCATION 0x08 ext_in_resp_to_msc_invoc_c

ext_out_tr_ho_c

ext_out_pre_empt_ho_c

inter_tr_ho_c

inter_pre_empt_ho_c

intra_pre_empt_ho_c

reset_crct_c

m_resp_to_msc_invoc_c

CALL CONTROL 0x09 ho_not_allowed_c

target_fail_c

source_fail_c

has_call_control_c

aiv_ssp_c

sccp_conn_fail_c

sccp_conn_timeout_c

sccp_release_c

global_reset_c

no_dtap_from_msc_c

ho_denied_assign_c

ho_denied_ciphering_c

ho_denied_clear_c

ho_denied_no_sccp_conn_c

T7_expiry_c

ho_denied_no_proper_crc_c

aiv_pagin_refus_big_load_c

sc7_ssp_c

m_call_control_c

RADIO INTERFACE FAILURE, REVERSION TO OLD CHANNEL 0x0A ass_fail_msg_c

ho_fail_c

restore_old_c

m_r_if_f_rev_to_old_c

HANDOVER SUCCESSFULL 0x0B m_handover_succ_c

BETTER CELL 0x0C ext_in_better_cell_c

ext_out_pbgt_ho_c

ext_out_umbrella_ho_c

ext_out_slow_moving_ms_c

ext_out_det_slow_mov_ms_c

ext_out_det_fast_mov_ms_c

inter_pbgt_ho_c

inter_umbrella_ho_c

inter_slow_moving_ms_c

inter_det_slow_mov_ms_c

intra_ho_to_amr_hr_c

intra_ho_to_amr_fr_c

inter_erfd_ho_c

ext_out_erfd_ho_c

m_better_cell_c

DIRECTED RETRY 0x0D ext_in_directed_retry_c

ext_out_dr_ho_c

ext_out_idr_ho_c

inter_dr_ho_c

inter_idr_ho_c

intra_dr_ho_c

m_directed_retry_c

TRAFFIC 0x0F ext_in_bsc_trho_c

intra_gprs_ho_c

intra_inter_band_tch_c

intra_inter_band_sdc_c

inter_bsc_trho_c

inter_dadlb_c

ext_out_bsc_trho_c

intra_inter_bts_type_tch_c

intra_inter_bts_type_sdc_c

intra_ho_due_to_hscsd_c

m_traffic_c

EQUIPMENT FAILURE 0x20 bts_fail_block_c

lapd_fail_block_c

abis_fail_block_c

abis_msg_corrup_to_bts_c

block_slave_c

ch_act_nack_equip_fail_c

ch_act_fail_c

conn_fail_rem_trans_fail_c

no_resp_from_copro_c

rcs_alg_start_ack_fail_c

rcs_alg_cl_ack_fail_c

rc0_disco_ind_c

state_confligt_c

type_confligt_c

mode_mod_nack_equip_fail_c

ho_interrupted_c

downgrade_c

ho_no_started_c

conf_change_not_allowed_c

hscsd_copro_fail_c

sub_timer_c

upgrade_fail_c

no_resp_from_coprocess_c

no_resp_to_radio_res_req_c

has_state_confligt_c

no_resp_to_ho_cpl_msg_c

aiv_hand_act_fail_c

T10_expiry_c

aiv_crct_res_timeout_c

aiv_crct_conn_timeout_c

aiv_crct_disconn_timeout_c

aiv_crct_rel_timeout_c

aiv_timeout_c

act_ctrl_timeout_c

aiv_conn_refresh_timeout_c

aiv_conn_refresh_failed_c

rc0_hand_act_fail_c

a_crct_conn_err_c

rc0_crct_conn_timeout_c

access_out_of_crct_tbl_c

a_crct_rel_err_c

rc0_a_crct_congestion_c

rc0_crct_pool_mismatch_c

rc0_ilc_file_error_c

a_tsl_user_mismatch_c

sc7_crct_res_timeout_c

sc7_crct_conn_timeout_c

sc7_crct_disconn_timeout_c

sc7_crct_rel_timeout_c

lsi_access_fail_c

scc_access_fail_c

crct_equipment_fail_c

a_pcm_fault_c

m_equipment_fail_c

NO RADIO RESOURCE AVAILABLE 0x21 ch_act_nack_rad_ch_alr_a_c

rrm_serv_req_nack_c

dr_fail_c

rtsl_reconf_fail_c

no_radio_res_avail_c

m_no_radio_res_avail_c

REQUESTED TERRESTRIAL RESOURCE UNAVAILABLE 0x22 unknown_a_pcm_c

a_tsl_blocked_c

a_tsl_status_unknown_c

undef_tsl_in_lsi_c

m_req_terr_res_unava_c

CCCH OVERLOAD 0x23 overload_c

m_cch_overload_c

PROCESSOR OVERLOAD 0x24 m_processor_overload_c

BSS NOT EQUIPPED 0x25 mode_mod_nack_c

conf_change_bts_fail_c

m_bss_not_equipped_c

MS NOT EQUIPPED 0x26 rrm_ms_not_supporting_c

m_ms_not_equipped_c

INVALID CELL 0x27 rrm_invalid_cell_c

m_invalid_cell_c

TRAFFIC LOAD 0x28 ext_out_isho_c

rc0_hunting_queue_full_c

rc0_a_search_error_c

rc0_rej_due_eme_call_c

PREEMPTION 0x29 ext_in_pre_empt_c

forced_rel_c

m_pre_empt_c

REQUESTED TRANSCODING/RATE ADAPTION UNAVAILABLE 0x30 ch_act_nack_serv_not_ava_c

mode_mod_nack_trc_rat_un_c

ch_act_nack_ch_mode_err_c

rrm_bts_not_supporting_c

aiv_transc_or_rate_unava_c

rc0_transc_or_rate_unava_c

m_tr_cod_rat_ad_unav_c

CIRCUIT POOL MISMATCH 0x31 m_cip_type_mismatch_c

SWITCH CIRCUIT POOL 0x32 ext_in_switch_crc_pool_c

ext_out_switch_crc_pool_c

rrm_switch_src_pool_c

rc0_cip_type_mismatch_c

m_switch_crc_pool_c

REQUESTED SPEECH VERSION UNAVAILABLE 0x33 rrm_speech_ver_unavail_c

rc0_req_speech_ver_unava_c

m_speech_version_unavail_c

CIPHERING ALGORITHM NOT SUPPORTED 0x40 ch_act_nack_encryp_alg_c

err_rep_enc_alg_not_imp_c

m_ciph_alg_not_supp_c

TERRESTRIAL CIRCUIT ALREADY ALLOCATED 0x50 a_crct_alr_res_c

m_terr_chan_alr_allc_c

INVALID MESSAGE CONTENTS 0x51 ch_type_mismatch_c

aiv_speech_version_unava_c

rc0_inv_msg_contents_c

m_invalid_msg_cont_c

INFORMATION ELEMENT OF FIELD MISSING 0x52 m_ie_or_field_missing_c

INCORRECT VALUE 0x53 m_incorrect_value_c

UNKNOWN MESSAGE TYPE 0x54 m_unkown_msg_type_c

UNKNOWN INFORMATION ELEMENT 0x55 m_unknown_ie_c

PROTOCOL ERROR BETWEEN BSC AND MSC 0x60 invalid_bssmap_msg_c

m_prot_err_b_bsc_msc_c

319

321

322

324

326

329

335

340

344

345

350

356

358

370

506

507

900

308

315

316

317

320

327

333

334

336

343

349

352

354

365

901

80

103

105

123

125

141

902

81

101

114

121

134

903

82

102

104

DEC

122

124

136

137

140

143

144

145

904

83

100

120

150

158

169

905

84

106

115

126

135

147

148

400

906

85

109

129

142

300

301

309

342

368

509

817

819

907

86

111

113

131

133

146

811

908

500

510

511

512

601

602

603

604

606

608

609

610

611

612

613

623

627

813

909

306

323

502

910

911

87

107

108

117

118

119

127

128

138

139

152

153

157

163

912

88

110

112

130

132

149

913

92

151

154

155

159

160

164

166

167

168

937

302

303

304

305

307

310

314

318

328

330

331

332

337

338

346

360

361

362

363

366

367

369

503

504

505

508

600

614

615

616

617

618

619

620

628

629

700

702

703

704

705

711

713

715

800

801

802

803

804

807

808

810

815

914

312

348

351

359

501

915

622

805

806

809

916

341

917

918

325

364

919

404

920

405

926

190

710

712

714

91

339

936

313

347

355

403

625

706

921

933

90

116

401

707

934

402

709

935

311

353

922

701

923

624

626

708

927

928

929

930

931

621

924

Counter description Counter

Number of SDCCH transaction failures due to BSS failure 1002

Number of SDCCH transaction failures due to a radio failure (incremented only in phases 1-8) 1003

1003

1003

1003

1003

1003

1003

1003

1003

1003

1003

1003

1003

1003

1003

1003

1004

1004

1004

1004

1004

1004

1004

1004

1004

1004

1004

1004

1004

1005

1005

1005

1005

1005

1005

1005

1005

1005

1005

1005

1005

Number of SDCCH transaction failures due to a radio failure of the old channel during and SDCCH-SDCCH or SDCCH-TCH handover (incremented only in phases 9–11)

Number of SDCCH transaction failures due to a radio failure of the new channel during a SDCCH handover (incremented only in phases 12-14)

1005

1005

1005

Number of radio TCH transactions ended due to BSS problems 1012

Number of radio TCH transactions ended due to a radio failure (incremented only in phases 1-8, 15) 1013

1013

1013

1013

1013

1013

1013

1013

1013

1013

1013

1013

1013

1013

1013

1013

1014

1014

1014

1014

1014

1014

1014

1014

1014

1014

1014

1014

1014

1015

1015

1015

1015

1015

1015

1015

1015

1015

1015

Number of radio TCH ansactions ended due to a radio failure of the old channel during a HO on a TCH (incremented only in phases 9-11)

Number of radio TCH transactions ended due to a radio failure of the new channel during a HO on a TCH (incremented only in phases 12-14)

1015

1015

1015

1015

1015

Number of SDCCH transaction failures due to an activation failure 1027

Number of radio TCH transactions ended due to an activation failure 1028

1029

1030

1031

Number of SDCCH transaction failures due to Abis interface failure 1033

Number of SDCCH transaction failures due to A interface failure 1034

Number of SDCCH transaction failures due to a LAPD failure 1035

Number of SDCCH transaction failures due to a BTS failure 1036

Number of SDCCH transaction failures due to user actions 1037

Number of SDCCH transaction failures due to radio network reconfiguration actions 1039

Number of TCH transaction failures due to an Abis interface failure 1045

Number of TCH transaction failures due to a LAPD failure 1046

Number of TCH transaction failures due to a BTS failure 1047

Number of TCH transaction failures due to user actions 1048

Number of TCH transaction failures due to radio network reconfiguration actions 1050

Number of TCH transaction failures due to an A interface failure 1051

1072

1072

1072

1072

1072

1072

1072

1072

1072

1072

1072

1072

1072

1072

1072

1074

1074

1074

1074

1074

Number of radio TCH transactions ended due to a transcoder failure (incremented only in phases 1-8, 15)

Number of radio TCH transactions ended due to a transcoder failure of the old channel during a HO on a TCH (incremented only in phases 9-11)

Number of radio TCH transactions ended due to a transcoder failure of the new channel during a HO on a TCH (incremented only in phases 12-14)

Number of SDCCH transaction failures due to an activation failure during call (incremented only in phases 1-8)

Number of SDCCH transaction failures due to an activation failure of the new channel during an SDCCH handover (incremented only in phases 12-14)

1074

1074

1074

1074

1074

1074

1074

1074

1074

1074

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1075

1076

1076

1076

1076

1076

1076

1076

1076

1076

1076

1076

1076

1076

1076

Number of SDCCH transaction failures due to an Abis interface failure during call (incremented only in phases 1-8)

Number of SDCCH transaction failures due to an Abis interface failure on the old channel during SDCCH-SDCCH or SDCCH-TCH handover (incremented only in phases 9-11)

1076

1076

1076

1076

1076

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1077

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

Number of SDCCH transaction failures due to an Abis interface failure on the new channel during SDCCH-SDCCH or SDCCH-TCH handover (incremented only in phases 12-14)

Number of SDCCH transaction failures due to an A interface failure during call attempt (incremented only in phases 1-8)

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1078

1079

1079

1079

1079

1079

1079

1079

1079

Number of SDCCH transaction failures due to an A interface failure on the old channel during SDCCH-SDCCH or SDCCH-TCH handover (incremented only in phases 9-11)

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1079

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

Number of SDCCH transaction failures due to an A interface failure on the new channel during and SDCCH handover (incremented only in phases 12-14)

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1080

1081

1081

1081

1081

1081

1081

1081

1081

1081

1081

1081

1081

1081

1081

1081

1083

1083

1083

1083

1083

1083

1083

1083

1083

1083

1083

1083

1083

1083

1083

Number of radio TCH transactions ended due to an activation failure during call attempt (incremented only in phases 1-8)

Number of radio TCH transactions ended due to an activation failure on the new channel during an SDCCH-TCH or TCH-TCH handover (incremented only in phases 12-14)

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1084

1085

1085

1085

1085

1085

1085

1085

1085

1085

1085

1085

1085

1085

1085

1085

1085

1085

1085

1085

1086

1086

1086

1086

Number of TCH transaction failures due to an Abis interface failure during call (incremented only in phases 1-8, 15)

Number of TCH transaction failures due to an Abis interface failure on the old channel during a TCH handover (incremented only in phases 9-11)

Number of TCH transaction failures due to an Abis interface failure on the new channel during a TCH handover (incremented only in phases 12-14)

1086

1086

1086

1086

1086

1086

1086

1086

1086

1086

1086

1086

1086

1086

1086

1086

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

Number of TCH transaction failures due to an A interface failure during call (incremented only in phases 1-8, 15)

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1087

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

Number of TCH transaction failures on the old channel due to an A interface failure during handover attempt (incremented only in phases 9-11)

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1088

1089

1089

1089

1089

1089

1089

Number of TCH transaction failures on the new channel due to an A interface failure during handover attempt (incremented only in phases 12-14)

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1089

1139

1139

1139

1139

1139

1139

1139

1139

1139

1139

1139

1139

1139

1139

1139

1139

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

Number of TCH releases due to radio failures in call set-up phase before connect acknowledgement (incremented only in phases 2, 3, 5, 8–14)

Number of the TCH releases due to BSS failures in call set-up phase before connect acknowledgement (incremented only in phases 2, 3, 5, 8–14)

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

1140

DX cause DEC

This is a sum of the counters 1033, 1034, 1035, 1036

ass_fail_msg_c 306

conn_fail_c 315

conn_fail_rad_inf_fail_c 316

conn_fail_rad_link_fail_c 317

err_ind_c 320

ho_fail_c 323

ho_detect_fail_c 324

ch_mode_mod_fail_c 349

ass_fail_c 350

error_report_c 354

conf_change_ms_fail_c 365

timing_advance_c 400

no_resp_from_coprocess_c 503

ms_is_lost_c 507

target_fail_c 510

source_fail_c 511

ass_fail_msg_c 306

conn_fail_c 315



err_ind_c 320

ho_fail_c 323


ass_fail_c 350

error_report_c 354



ms_is_lost_c 507

target_fail_c 510

ass_fail_msg_c 306

conn_fail_c 315



err_ind_c 320

ho_fail_c 323



ass_fail_c 350

error_report_c 354




ms_is_lost_c 507

source_fail_c 511

This is a sum of the counters 1045, 1046, 1047, 1051

ass_fail_msg_c 306

conn_fail_c 315



err_ind_c 320

ho_fail_c 323



ass_fail_c 350

error_report_c 354




ms_is_lost_c 507

target_fail_c 510

source_fail_c 511

ass_fail_msg_c 306

conn_fail_c 315



err_ind_c 320

ho_fail_c 323


ass_fail_c 350

error_report_c 354



ms_is_lost_c 507

target_fail_c 510

ass_fail_msg_c 306

conn_fail_c 315



err_ind_c 320

ho_fail_c 323



ass_fail_c 350

error_report_c 354




ms_is_lost_c 507

source_fail_c 511

This is a sum of the counters 1072, 1074

This is a sum of the counters 1081, 1083

conn_fail_rem_trans_fail_c 318



This is a sum of the counters 1075, 1076, 1077


lapd_fail_block_c 303

bts_fail_block_c 302

user_act_block_c 300

netw_act_block_c 301




user_act_block_c 300

netw_act_block_c 301


ch_act_nack_c 308

ch_act_nack_om_inter_c 309

ch_act_nack_equip_fail_c 310

ch_act_nack_encryp_alg_c 311

ch_act_nack_rad_ch_alr_a_c 312

ch_act_nack_serv_not_ava_c 313

mode_mod_nack_c 325

mode_mod_nack_equip_fail_c 346

mode_mod_nack_trc_rat_un_c 347

err_rep_enc_alg_not_imp_c 353

ch_act_nack_ch_mode_err_c 355

ch_act_nack_gen_ie_err_c 356

speech_version_unavail_c 357

conf_change_bts_fail_c 364

rrm_speech_ver_unavail_c 402

ch_act_nack_c 308






mode_mod_nack_c 325









abis_fail_block_c 304

abis_msg_corrup_to_bts_c 305

block_slave_c 307

ch_act_fail_c 314

data_ind_corrup_c 319

estab_ind_fail_c 321

estab_conf_fail_c 322

mode_mod_ack_fail_c 326

no_meas_result_c 327

no_resp_from_copro_c 328

phy_cont_conf_fail_c 329

rcs_alg_start_ack_fail_c 330

rcs_alg_cl_ack_fail_c 331

rf_ch_rel_ack_fail_c 333

rel_ind_fail_c 335

signalling_error_c 336

sapi_3_fail_c 343

sub_timer_c 367

estab_ind_corrupted_c 370

has_state_confligt_c 505



block_slave_c 307

ch_act_fail_c 314











rel_ind_fail_c 335


sapi_3_fail_c 343





block_slave_c 307

ch_act_fail_c 314











rel_ind_fail_c 335


sapi_3_fail_c 343

sub_timer_c 367



rc0_disco_ind_c 332

rrm_switch_crc_pool_c 401

clear_cmd_not_received_c 506

no_resp_to_ho_cpl_msg_c 508

aiv_hand_act_fail_c 600

aiv_ssp_c 601

sccp_conn_fail_c 602

sccp_conn_timeout_c 603

sccp_release_c 604

global_reset_c 606

no_dtap_from_msc_c 608

ho_denied_assign_c 609

ho_denied_ciphering_c 610

ho_denied_clear_c 611

ho_denied_no_sccp_conn_c 612

T7_expiry_c 613

T10_expiry_c 614

aiv_crct_res_timeout_c 615

aiv_crct_conn_timeout_c 616

aiv_crct_disconn_timeout_c 617

aiv_crct_rel_timeout_c 618

aiv_timeout_c 619

act_ctrl_timeout_c 620

invalid_bssmap_msg_c 621

unknown_a_pcm_c 622

ho_denied_no_proper_crc_c 623

ch_type_mismatch_c 624

aiv_transc_or_rate_unava_c 625

aiv_speech_version_unava_c 626

aiv_conn_refresh_timeout_c 628

aiv_conn_refresh_failed_c 629

rc0_hand_act_fail_c 700

a_crct_alr_res_c 701

a_crct_conn_err_c 702

rc0_crct_conn_timeout_c 703

access_out_of_crct_tbl_c 704

a_crct_rel_err_c 705

rc0_transc_or_rate_unava_c 706

rc0_cip_type_mismatch_c 707

rc0_inv_msg_contents_c 708

rc0_req_speech_ver_unava_c 709

rc0_hunting_queue_full_c 710

rc0_a_crct_congestion_c 711

rc0_a_search_error_c 712

rc0_crct_pool_mismatch_c 713

rc0_rej_due_eme_call_c 714

rc0_ilc_file_error_c 715

a_tsl_user_mismatch_c 800

sc7_crct_res_timeout_c 801

sc7_crct_conn_timeout_c 802

sc7_crct_disconn_timeout_c 803

sc7_crct_rel_timeout_c 804

a_tsl_blocked_c 805

a_tsl_status_unknown_c 806

lsi_access_fail_c 807

scc_access_fail_c 808

undef_tsl_in_lsi_c 809

crct_equipment_fail_c 810

reset_crct_c 811

sc7_ssp_c 813

a_pcm_fault_c 815

a_crct_removed_c 817

a_et_state_change_c 819

m_radio_if_mess_fail_c 900

m_radio_if_fail_c 901

m_uplink_quality_c 902

m_uplink_strength_c 903

m_downlink_quality_c 904

m_downlink_strength_c 905

m_distance_c 906

m_o_and_m_inter_c 907

m_resp_to_msc_invoc_c 908

m_r_if_f_rev_to_old_c 910

m_handover_succ_c 911

m_better_cell_c 912

m_directed_retry_c 913

m_equpment_fail_c 914

m_no_radio_res_avail_c 915

m_req_terr_res_unava_c 916

m_cch_overload_c 917

m_processor_overload_c 918

m_bss_not_equipped_c 919

m_ms_not_equipped_c 920

m_tr_cod_rat_ad_unav_c 921

m_ciph_alg_not_supp_c 922

m_terr_chan_alr_allc_c 923

m_prot_err_b_bsc_msc_c 924

m_unexpected_c 925

m_invalid_cell_c 926

m_invalid_msg_cont_c 927

m_ie_or_field_missing_c 928

m_incorrect_value_c 929

m_unknown_msg_type_c 930

m_unknown_ie 931

m_transc_or_rate_unavail_c 932

m_cip_type_mismatch_c 933

m_switch_crc_pool_c 934

m_speech_version_unavail_c 935

m_pre_empt_c 936

m_traffic_c 937

rc0_disco_ind_c 332





aiv_ssp_c 601



sccp_release_c 604

global_reset_c 606






T7_expiry_c 613

T10_expiry_c 614





aiv_timeout_c 619



unknown_a_pcm_c 622




























a_tsl_blocked_c 805






reset_crct_c 811

sc7_ssp_c 813

a_pcm_fault_c 815









m_distance_c 906





m_better_cell_c 912













m_unexpected_c 925



m_ie_or_field_missing 928

m_incorrect_value 929

m_unknown_msg_type 930

m_unknown_ie 931





m_pre_empt_c 936

m_traffic_c 937

rc0_disco_ind_c 332





aiv_ssp_c 601



sccp_release_c 604

global_reset_c 606






T7_expiry_c 613

T10_expiry_c 614





aiv_timeout_c 619



unknown_a_pcm_c 622




























a_tsl_blocked_c 805






reset_crct_c 811

sc7_ssp_c 813

a_pcm_fault_c 815









m_distance_c 906





m_better_cell_c 912













m_unexpected_c 925






m_unknown_ie_c 931





m_pre_empt_c 936

m_traffic_c 937

ch_act_nack_c 308






mode_mod_nack_c 325









ch_act_nack_c 308






mode_mod_nack_c 325











block_slave_c 307

ch_act_fail_c 314











rel_ind_fail_c 335


sapi_3_fail_c 343

sub_timer_c 367





block_slave_c 307

ch_act_fail_c 314











rel_ind_fail_c 335


sapi_3_fail_c 343





block_slave_c 307

ch_act_fail_c 314











rel_ind_fail_c 335


sapi_3_fail_c 343

sub_timer_c 367



rc0_disco_ind_c 332





aiv_ssp_c 601



sccp_release_c 604

global_reset_c 606






T7_expiry_c 613

T10_expiry_c 614





aiv_timeout_c 619



unknown_a_pcm_c 622




























a_tsl_blocked_c 805






reset_crct_c 811

sc7_ssp_c 813

a_pcm_fault_c 815









m_distance_c 906





m_better_cell_c 912













m_unexpected_c 925






m_unknown_ie_c 931





m_pre_empt_c 936

m_traffic_c 937

rc0_disco_ind_c 332





aiv_ssp_c 601



sccp_release_c 604

global_reset_c 606






T7_expiry_c 613

T10_expiry_c 614





aiv_timeout_c 619



unknown_a_pcm_c 622




























a_tsl_blocked_c 805






reset_crct_c 811

sc7_ssp_c 813

a_pcm_fault_c 815









m_distance_c 906





m_better_cell_c 912













m_unexpected_c 925






m_unknown_ie_c 931





m_pre_empt_c 936

m_traffic_c 937

rc0_disco_ind_c 332





aiv_ssp_c 601



sccp_release_c 604

global_reset_c 606






T7_expiry_c 613

T10_expiry_c 614





aiv_timeout_c 619



unknown_a_pcm_c 622




























a_tsl_blocked_c 805






reset_crct_c 811

sc7_ssp_c 813

a_pcm_fault_c 815









m_distance_c 906





m_better_cell_c 912













m_unexpected_c 925






m_unknown_ie_c 931





m_pre_empt_c 936

m_traffic_c 937

ass_fail_msg_c 306

conn_fail_c 315



err_ind_c 320

ho_fail_c 323



ass_fail_c 350

error_report_c 354




ms_is_lost_c 507

target_fail_c 510

source_fail_c 511





block_slave_c 307

ch_act_fail_c 314










rc0_disco_ind_c 332


rel_ind_fail_c 335


sapi_3_fail_c 343

sub_timer_c 367







aiv_ssp_c 601



sccp_release_c 604

global_reset_c 606






T7_expiry_c 613

T10_expiry_c 614





aiv_timeout_c 619



unknown_a_pcm_c 622




























a_tsl_blocked_c 805






reset_crct_c 811

sc7_ssp_c 813

a_pcm_fault_c 815









m_distance_c 906





m_better_cell_c 912


m_equipment_fail_c 914






m_ms_not_eqipped_c 920





m_unexpected_c 925






m_unknown_ie_c 931





m_pre_empt_c 936

m_traffic_c 937

DX causes of Call related DX causes in BSC

The DX cause contains a field for the phase and the cause. The cause element of the DX cause is set by the different program blocks which offer services for the call setup and handover features. The causes are set as follows:

1. The MS receives access to the network with the relevant establishment cause (success cause).

2. The handover starts with the relevant handover cause (success cause).

3. A failure has occurred during the call or handover (failure cause).

These cases are divided into two different cause classes which are called success and failure causes. The DX causes are conveyed within the internal signalling message.

Success causes

The meanings of the success causes are represented below:

1. location_update (10)

The location update.

2. facch_emergency_call (20)

The FACCH calls for which the establishment cause is an emergency call.

3. facch_reestablishment (21)

The FACCH calls for which the establishment cause is re-establishment.

4. facch_answer_to_pagin (22)

The FACCH calls for which the establishment cause is answering to paging.

5. facch_mo_speech_call (23)

The FACCH calls for which the establishment cause is a mobile originating speech call.

6. facch_mo_data_call (24)

The FACCH calls for which the establishment cause is a mobile originating data call.

7. facch_other_procedure (25)

The FACCH calls for which the establishment cause is another procedure.

8. facch_mt_data_call (26)

The FACCH calls for which the establishment cause is a mobile terminating data call.

9. facch_imsi_detach (27)

10. basic_emergency_call (40)

The basic calls for which the establishment cause is an emergency call.

11. basic_reestablishment (41)

The basic calls for which the establishment cause is re-establishment.

12. basic_answer_to_pagin (42)

The basic calls for which the establishment cause is answering to paging.

13. basic_mo_speech_call (43)

The basic calls for which the establishment cause is a mobile originating speech call.

14. basic_mo_data_call (44)

The basic calls for which the establishment cause is a mobile originating data call.

15. basic_other_procedure (45)

The basic calls for which the establishment cause is another procedure.

16. basic_mt_data_call (46)

The basic calls for which the establishment cause is a mobile terminating data call.

17. basic_imsi_detach (47)

Number of IMSI detaches on the SDCCH channel.

18. ext_in_ul_quality (80)

The incoming external handover. The handover setup cause is uplink quality.

19. ext_in_ul_strength (81)

An incoming external handover. The handover setup cause is uplink strength.

20. ext_in_dl_quality (82)

An incoming external handover. The handover setup cause is downlink quality.

21. ext_in_dl_strength (83)

An incoming external handover. The handover setup cause is downlink strength.

Number of IMSI detaches on the TCH channel due to SDCCH congestion.

http://127.0.0.1:41403/s10_5e/NED?action=retrieve&identifier=dn9763965&edition=13&language=en&coverage=global&encoding=xhtml_1_0&component=data&item=data&pointer=id04476#id04476

22. ext_in_distance (84)

An incoming external handover. The handover setup cause is distance.

23. ext_in_o_and_m_inter (85)

24. ext_in_resp_to_msc_invoc (86)

An incoming external handover. The handover setup cause is resp_to_msc_invoc.

25. ext_in_better_cell (87)

An incoming external handover. The handover setup cause is a better cell.

26. ext_in_directed_retry (88)

An incoming external handover. The handover setup cause is a directed retry.

27. ext_in_unexpected (89)

An incoming external handover. The handover setup cause is unexpected.

28. ext_in_switch_crc_pool (90)

An incoming external handover attempt for changing the A interface circuit pool.

29. ext_in_pre_empt_c (91)

An incoming external handover. The handover setup cause is preemption.

30. ext_in_bsc_trho_c (92)

An incoming external handover. The handover setup cause is a BSC traffic reason handover.

31. ext_in_isho_c (93)

An incoming external inter-system handover

32. ext_out_dl_rxlev (100)

An outgoing external handover. The handover setup cause is the downlink rx level.

33. ext_out_ul_rxlev (101)

An outgoing external handover. The handover setup cause is the uplink rx level.

An incoming external handover. The handover setup cause is O and M intervention.

34. ext_out_dl_rxqual (102)

An outgoing external handover. The handover setup cause is the downlink rx quality.

35. ext_out_ul_rxqual (103)

An outgoing external handover. The handover setup cause is the uplink rx quality.

36. ext_out_dl_interf (104)

An outgoing external handover. The handover setup cause is the downlink interference.

37. ext_out_ul_interf (105)

An outgoing external handover. The handover setup cause is the uplink interference.

38. ext_out_distance (106)

An outgoing external handover. The handover setup cause is distance.

39. ext_out_pbgt_ho (107)

An outgoing external handover. The handover setup cause is PBGT handover.

40. ext_out_umbrella_ho (108)

An outgoing external handover. The handover setup cause is an umbrella handover.

41. ext_out_forced_ho (109)

An outgoing external handover. The handover setup cause is a forced handover.

42. ext_out_dr_ho (110)

An outgoing external handover. The handover setup cause is DR (directed retry) handover.

43. ext_out_tr_ho (111)

An outgoing external handover. The handover setup cause is TR (traffic reason) handover.

44. ext_out_idr_ho (112)

An outgoing external handover. The handover setup cause is IDR handover.

45. ext_out_pre_empt_ho (113)

An outgoing external handover. The handover setup cause is pre-emption handover.

46. ext_out_rap_fld_drop (114)

An outgoing external handover. The handover setup cause is a rapid field drop.

47. ext_out_low_distance (115)

An outgoing external handover. The handover setup cause is a low distance (extended cell radius feature).

48. ext_out_switch_crc_pool (116)

An outgoing external handover attempt for changing the A interface circuit pool.

49. ext_out_slow_moving_ms (117)

An outgoing external handover. The handover setup cause is a Slow Moving MS in the Macro Cell. The slow moving detection is based on the received measurement of adjacent micro cells and on the umbrella like handover criterias.

50. ext_out_det_slow_mov_ms (118)

An outgoing external handover. The handover setup cause is the low speed of the MS. The slow moving detection is based on the MS speed indications sent by the BTS.

51. ext_out_det_fast_mov_ms (119)

An outgoing external handover. The handover setup cause is a high speed of MS. The fast moving detection is based on the MS speed indications sent by the BTS.

52. ext_out_erfd_ho (163)

Handover cause for Enhanced Field Drop handover.

53. ext_out_bsc_trho_c (164)

An outgoing external handover whose setup cause is a BSC traffic reason handover.

54. ext_out_isho_c (190)

An outgoing external inter-system handover. The handover setup cause is BSC traffic load.

55. inter_dl_rxlev (120)

An internal inter handover. The handover setup cause is the downlink rx level.

56. inter_ul_rxlev (121)

An internal inter handover. The handover setup cause is the uplink rx level.

57. inter_dl_rxqual (122)

An internal inter handover. The handover setup cause is the downlink rx quality.

58. inter_ul_rxqual (123)

An internal inter handover. The handover setup cause is the uplink rx quality.

59. inter_dl_interf (124)

An internal inter handover. The handover setup cause is the downlink interference.

60. inter_ul_interf (125)

An internal inter handover. The handover setup cause is the uplink interference.

61. inter_distance (126)

An internal inter handover. The handover setup cause is distance.

62. inter_pbgt_ho (127)

An internal inter handover. The handover setup cause is PBGT handover.

63. inter_umbrella_ho (128)

An internal inter handover. The handover setup cause is an umbrella handover.

64. inter_forced_ho (129)

An internal inter handover. The handover setup cause is a forced handover.

65. inter_dr_ho (130)

66. inter_tr_ho (131)

An internal inter handover. The handover setup cause is a TR (traffic reason) handover.

67. inter_idr_ho (132)

An internal inter handover. The handover setup cause is an IDR handover.

68. inter_pre_empt_ho (133)

An internal inter handover. The handover setup cause is a pre-emption handover.

69. inter_rap_fld_drop (134)

An internal inter handover. The handover setup cause is a rapid field drop.

70. inter_low_distance (135)

An internal inter handover. The handover setup cause is a low distance (extended cell radius feature).

An internal inter handover. The handover setup cause is a DR handover.


71. inter_ok_ci_ratio (136)

An internal inter handover. The handover setup cause is an ok C/I ratio (Underlay-overlay handover).

72. inter_bad_ci_ratio (137)

An internal inter handover. The handover setup cause is a bad C/I ratio (Underlay-overlay handover).

73. inter_slow_moving_ms (138)

An internal inter handover. The handover setup cause is a Slow Moving MS in the Macro Cell. The slow moving detection is based on the received measurement of adjacent micro cells and on the umbrella like handover criterias.

74. inter_det_slow_mov_ms (139)

An internal inter handover. The handover setup cause is the low speed of the MS. The slow moving detection is based on the MS speed indications sent by the BTS.

75. inter_det_fast_mov_ms (156)

An internal inter handover. The handover setup cause is the high speed of the MS. The fast moving detection is based on the MS speed indications sent by the BTS.

76. inter_erfd_ho (157)

Handover cause for Enhanced Field Drop handover.

77. Inter_direct_access (158)

The counter indicates the number of successful internal inter-cell handovers from a dedicated control channel to a super-reuse TRX. Handover setup cause is the direct access procedure.

78. inter_bsc_trho_c (159)

An internal inter handover whose setup cause is a BSC traffic reason handover.

79. inter_dadlb_c (160)

An internal inter handover whose setup cause is the Direct Access to Desired Layer/Band feature.

80. intra_dl_interf (140)

An internal intra handover. The handover setup cause is the downlink interference.

81. intra_ul_interf (141)

An internal intra handover. The handover setup cause is the uplink interference.

82. intra_forced_ho (142)

An internal intra handover. The handover setup cause is a forced handover.

83. intra_dl_rxqual (143)

An internal intra handover. The handover setup cause is the downlink rx quality.

84. intra_ok_ci_ratio (144)

An internal intra handover. The handover setup cause is an ok C/I ratio (Underlay-overlay handover).

85. intra_bad_ci_ratio (145)

An internal intra handover. The handover setup cause is a bad C/I ratio (Underlay-overlay handover).

86. intra_pre_empt_ho (146)

An internal intra handover. The handover setup cause is pre-emption handover.

87. intra_distance (147)

Intra cell handover from a normal area to an extended area. Intra cell handover from a normal area to an extended area is performed when the timing advance (TA) of the MS is equal or more than the parameter maxMSDistanceHOThreshold defines.

88. intra_low_distance (148)

Intra cell handover from an extended area to a normal area. Intra cell handover from an extended area to a normal area is performed when the timing advance (TA) of the MS is equal or less than the parameter minMSDistanceHOThreshold defines.

89. intra_dr_ho (149)

Assignment attempt from an SDCCH to a super-reuse frequency.

90. intra_direct_access (150)

91. intra_gprs_ho (151)

92. intra_ho_to_amr_hr (152)

An intra cell handover from AMR FR to AMR HR.

93. intra_ho_to_amr_fr (153)

An intra cell handover from AMR HR to AMR FR.

94. intra_inter_band_tch (154)

A TCH-TCH handover that has been made due to load reasons between BTSs on different frequency bands of a segment.

95. intra_inter_band_sdc (155)

The counter indicates the number of successful internal intra-cell handovers from a dedicated control channel to a super-reuse TRX . Handover setup cause is the direct access procedure.

An internal intra handover. The handover is done to get more resources for GPRS .



An SDCCH-SDCCH handover started based on SDCCH reservation duration in a BTS on the BCCH frequency band to a BTS on another frequency band.

96. intra_inter_bts_type_tch (166)

A TCH-TCH handover from an UltraSite BTS to a Talk Family BTS due to load reasons within a segment.

97. intra_inter_bts_type_sdc (167)

An SDCCH-SDCCH handover started based on SDCCH reservation duration from an UltraSite BTS to a Talk Family BTS within a segment.

98. intra_ho_due_to_hscsd (168)

99. intra_inter_band_due_lev_c (169)

A TCH-TCH handover from non-BCCH frequency layer between BTSs on different frequency bands of a segment due to weak downlink signal level.

Failure causes

The meanings of the failure causes are represented in the different program blocks as follows.

Causes set by the Abis Interface Program Block (ABIPRB)

1. user_act_block (300)

Channel blocking caused by the user.

2. netw_act_block (301)

Channel blocking caused by the network.

3. bts_fail_block (302)

Channel blocking caused by BTS failure.

4. lapd_fail_block (303)

5. abis_fail_block (304)

Channel blocking caused by Abis failure.

6. abis_msg_corrup_to_bts (305)

The packing of the Abis interface message fails.

An intra cell handover made to enable an HSCSD upgrade.

Channel blocking caused by LAPD failure.



7. ass_fail_msg (306)

The Abis interface receives an assignment_failure message from the MS during a Basic Call.

8. block_slave (307)

Channel blocking caused by some other reason than the ones given above.

9. ch_act_nack (308)

The Abis interface receives a channel_activation_nack message or its contents have been corrupted.

10. ch_act_nack_om_inter (309)

11. ch_act_nack_equip_fail (310)

12. ch_act_nack_encryp_alg (311)

13. ch_act_nack_rad_ch_alr_a (312)

14. ch_act_nack_serv_not_ava (313)

15. ch_act_fail (314)

The Abis interface receives a channel_activation_ack message and its contents have been corrupted or a timer expires while waiting for the message.

16. conn_fail (315)

The Abis interface receives a connection_failure message.

17. conn_fail_rad_inf_fail (316)

18. conn_fail_rad_link_fail (317)

19. conn_fail_rem_trans_fail (318)

The Abis interface receives a channel_activation_nack message, and the cause is O and M intervention .

The Abis interface receives a channel_activation_nack message, and the cause is equipment failure .

The Abis interface receives a channel_activation_nack message and the cause is an encryption algorithm not supported .

The Abis interface receives a channel_activation_nack message and the cause is radio channel already allocated .

The Abis interface receives a channel_activation_nack message and the cause is that the service is not available .

The Abis interface receives a connection_failure message and its cause is radio interface failure .

The Abis interface receives a connection_failure message and its cause is radio link failure .

20. data_ind_corrup (319)

The Abis interface receives a data_indication message whose contents have been corrupted.

21. err_ind (320)

The Abis interface receives an error_indication message.

22. estab_ind_fail_c (321)

A timer expires while waiting for an establish_indication message.

23. estab_conf_fail (322)

The Abis interface receives an establish_confirm message. The contents of the message have been corrupted or a timer expires while waiting for the message.

24. ho_fail (323)

The handover has failed and the MS returns to the source channel. The MS has sent an assignment failure or a handover failure message to the network during the handover.

25. ho_detect_fail (324)

The Abis interface receives an ho_detect message. The contents of the message have been corrupted or a timer expires while waiting for the message.

26. mode_mod_nack (325)

The Abis interface receives a mode_modify_nack message.

27. mode_mod_ack_fail (326)

The Abis interface receives a mode_modify_ack message whose contents have been corrupted or a timer expires while waiting for the message.

28. no_meas_result (327)

No measurement result messages from the BTS.

29. no_resp_from_copro (328)

Timer expires because the co-process does not respond. A BSC internal failure.

30. phy_cont_conf_fail (329)

The Abis interface receives a physical_context_confirm message. The contents have been corrupted or a timer expires while waiting for the message.

31. rcs_alg_start_ack_fail (330)

The Abis interface receives a connection_failure message and its cause is remote transcoder failure .

The Abis interface receives an rcs_algorithm_start_ack message whose contents have been corrupted or a timer expires while waiting for the message. BSC internal signalling.

32. rcs_alg_cl_ack_fail (331)

The Abis interface receives an rcs_algorithm_clear_ack message whose contents have been corrupted or a timer expires while waiting for the message. BSC internal signalling.

33. rc0_disco_ind (332)

The Abis interface receives an rc0_disconnect_ind message from RC0.

34. rf_ch_rel_ack_fail (333)

The Abis interface receives an rf_ch_rel_ack message whose contents have been corrupted or a timer expires while waiting for the message.

35. rel_ind (334)

The Abis interface receives a release_indication message.

36. rel_ind_fail (335)

The Abis interface receives a release_indication message. The contents of the message have been corrupted or a timer expires while waiting for the message.

37. signalling_error (336)

DTAP signalling fails.

38. state_conflict (337)

An attempt to activate a blocked channel in the Abis interface.

39. type_conflict (338)

An attempt to activate a channel with the wrong information in the Abis interface.

40. forced_rel (339)

Forced TCH release.

41. rej_phantom_res (340)

Rejected phantom reservations caused by the wrong establishment cause in the channel required message from the MS or a too long distance between the MS and the BTS.

42. overload (341)

Overload message from the BTS.

43. abi_switchover (342)

The BCSU switchover has been started.

44. sapi_3_fail (343)

During the SMS establishment the Abis interface receives a release_indication message or the establish_indication message received has been corrupted.

45. paging_msg_fail (344)

The Abis interface receives an ms_paging message and the channel has been blocked.

46. ch_required_fail (345)

The Abis interface receives a channel_required message whose contents have been corrupted.

47. mode_mod_nack_equip_fail (346)

48. mode_mod_nack_trc_rat_un (347)

49. rrm_serv_req_nack (348)

The Abis interface receives an rrm_ch_serv_req_nack message.

50. ch_mode_mod_fail (349)

The Abis interface receives a ch_mode_modify_ack message and the mode has not been the same as the mode requested.

51. ass_fail (350)

Timer expires while waiting for the assignment_complete message.

52. dr_fail (351)

Directed retry procedure fails.

53. coprocess_fail (352)

A failure has occurred in co-process.

54. err_rep_enc_alg_not_imp (353)

55. error_report (354)

An error_report message received from the BTS.

The Abis interface receives a mode_modify_nack message with the cause equipment failure .

The Abis interface receives a mode_modify_nack message with the cause requested transcoding/rate adaption not available .

An error_report message is received from BTS and the cause is encryption algorithm not implemented .

56. ch_act_nack_ch_mode_err (355)

57. ch_act_nack_gen_ie_err (356)

58. speech_version_unavail (357)

59. ignored_double_rand_acc (358)

When random access buffering is used in an extended range cell, if two incoming random accesses have the same frame number, the latter one is ignored.

60. rtsl_reconf_fail (359)

Reconfiguration of a dynamic SDCCH resource has been failed at the time of the immediate assignment. All of the SDCCH resources under the control of the BCSU are already in use.

61. ho_interrupted (360)

If an assignment procedure is started before the MS is assigned to move to a new channel, handover attempt is terminated with DX cause ho_interrupted_c.

62. downgrade (361)

Number of channel releases caused by a downgrade.

63. ho_not_started (362)

Number of HO starts rejected due to other ongoing procedures.

64. conf_change_not_allowed (363)

Number of upgrades, downgrades and ALAs rejected due to other ongoing procedures.

65. conf_change_bts_fail (364)

Number of failed configuration changes due to mode modify nack or no answer from the BTS.

66. conf_change_ms_fail (365)

Number of failed configuration changes due to configuration change reject or no answer from the MS.

67. hscsd_copro_fail (366)

Number of channel releases caused by a failure in another channel in the HSCSD configuration.

68. sub_timer (367)

The Abis interface receives a channel_activation_nack message and the failure cause is either the not implemented unspecified or mandatory IE error .

The Abis interface receives a channel_activation_nack message and the failure cause is the general IE error .

The Abis interface receives an assignment_failure message or handover_failure message from the MS during an assignment or handover and the RR cause is channel mode unacceptable .

Number of timer expiries due to sub-channel not responding to the main channel in the HSCSD connection.

69. pre_emption (368)

Number of TCH pre-emption releases.

70. upgrade_fail (369)

Number of upgrade procedure failures.

71. estab_ind_corrupted_c (370)

Number of the ESTABLISH_INDICATION messages which the Abis interface receives because of the corrupted contents of the message.

Causes set by the Radio Connection Supervision Program Block (RCSPRB)

1. timing_advance (400)

The call is released after the distance between the MS and the BTS has reached the maximum value allowed, i.e. the MS has exceeded the planned cell boundaries.

2. rrm_switch_crc_pool (401)

The Radio Resource Management Program Block (RRMPRB) will set this cause in the TCH resource request negative acknowledgement message in order to indicate the A interface circuit pool change request.

3. rrm_speech_ver_unavail (402)

The requested speech version is not supported by the target BTS.

4. bts_not_supporting (403)

Resource that is not supported by BTS has been requested.

5. ms_not_supporting (404)

Resource that is not supported by MS has been requested.

6. rrm_invalid_cell_c (405)

The traffic channel allocation in the external handover has failed. The "Handover Request" message received by the BSS indicates a target cell which is not controlled by the BSS.

Causes set by the A interface Signalling Program Block in BSC (AIVPRB)

1. aiv_hand_act_fail (600)

Activation of a hand process fails in the AIVPRB master.

2. aiv_ssp (601)

SCCP connection establishment is not possible because the subsystem is in the prohibited status. The situation is detected by the AIVPRB master.

3. global_reset (606)

State change of an SCCP subsystem or a RESET message from the MSC.

4. sccp_conn_fail (602)

SCCP connection establishment fails. A CREF message is received from the MSC.

5. sccp_conn_timeout (603)

No response from the MSC to the SCCP connection establishment.

6. sccp_release (604)

Abnormal release of the SCCP connection (RLSD received).

7. no_dtap_from_msc (608)

No DTAP message from the MSC after a successful SCCP connection establishment.

8. ho_denied_assign (609)

Starting the handover is not allowed because an assignment procedure is in progress.

9. ho_denied_ciphering (610)

Starting the handover is not allowed because the ciphering procedure is in progress.

10. ho_denied_clear (611)

Starting the handover is not allowed because the call clearing procedure is in progress.

11. ho_denied_no_sccp_conn (612)

Starting the external SDCCH handover is not allowed because the SCCP connection establishment is not complete.

12. T7_expiry (613)

Expiry of the GSM timer T7.

13. T10_expiry (614)

Expiry of the GSM timer T10.

14. aiv_crct_res_timeout (615)

Timeout in the AIVPRB while allocating an A interface speech circuit.

15. aiv_crct_conn_timeout (616)

Timeout in the AIVPRB while connecting an A interface speech circuit.

16. aiv_crct_disconn_timeout (617)

Timeout in the AIVPRB while disconnecting an A interface speech circuit.

17. aiv_crct_rel_timeout (618)

Timeout in the AIVPRB while releasing an A interface speech circuit.

18. aiv_timeout (619)

Timeout in the AIVPRB in BSC internal communication.

19. act_ctrl_timeout (620)

The BSC internal supervision timer, which supervises the communication between the Abis and the A interface, has expired.

20. invalid_bssmap_msg (621)

An erroneous message, which leads to the clearing of the call, has been received from the MSC.

21. unknown_a_pcm (622)

Message received concerning an unknown A interface circuit.

22. ho_denied_no_proper_crc (623)

23. ch_type_mismatch (624)

The radio interface data rate requirement is totally contradictory with the TCH channel rate request of the channel type IE included in the normal Assignment Request or Handover Request. In the Assignment Request related to the In Call Modification or the FACCH call setup, the TCH channel rate request or the data rate request are totally contradictory with the type of TCH where the call is maintained.

24. aiv_transc_or_rate_unava (625)

The TCH type requested by the MSC is not supported.

25. aiv_speech_version_unava (626)

The speech coder version requested by the MSC is not supported.

26. aiv_pagin_refus_big_load (627)

A paging message is received from the MSC when the BCSU unit load is too high. The load is observed by the number of unhandled messages in the unit.

Handover is denied when the AIVPRB receives the handover inquiry message from the Handover Attempt Supervisor Program Block (HASPRB) with the cause switch circuit pool and there is no proper A interface circuit fitting in with the pool list of the inquiry message.

27. aiv_conn_refresh_timeout (628)

Timeout in the connection refreshing procedure.

28. aiv_conn_refresh_failed (629)

The connection refreshing procedure has failed.

Causes set by the Speech Circuit Control in GSM BSC A interface (SC7PRB)

1. a_tsl_user_mismatch (800)

A request to connect, disconnect or release a speech circuit is received from a process which is not recorded as a user of the circuit in the internal control tables of SC7PRB.

2. sc7_crct_res_timeout (801)

Timeout in the SC7PRB while allocating an A interface speech circuit.

3. sc7_crct_conn_timeout (802)

Timeout in the SC7PRB while connecting an A interface speech circuit.

4. sc7_crct_disconn_timeout (803)

Timeout in the SC7PRB while disconnecting an A interface speech circuit.

5. sc7_crct_rel_timeout (804)

Timeout in the SC7PRB while releasing an A interface speech circuit.

6. a_tsl_blocked (805)

Assignment of a circuit that is blocked.

7. a_tsl_status_unknown (806)

Assignment of a circuit whose status is unknown.

8. lsi_access_fail (807)

Access to the Line Signalling File (LSIGNL) failed.

9. scc_access_fail (808)

Access to the System-controlled Circuit State File (SCCTST) failed.

10. undef_tsl_in_lsi (809)

The circuit concerned is not defined in the LSIGNL file.

11. crct_equipment_fail (810)

The SC7PRB has detected a situation which has been caused by hardware problems.

12. reset_crct (811)

The RESET CIRCUIT message has been received from the MSC.

13. sc7_ssp (813)

14. a_pcm_fault (815)

A fault has been detected in the 2-Mbit PCM connection.

15. a_crct_removed (817)

A speech circuit has been removed from use.

16. a_et_state_change (819)

State change of the ET has occurred.

Causes set by the Resource Control Program Block in BSC (RC0PRB)

1. rc0_hand_act_fail (700)

The RC0PRB master fails to activate a hand process.

2. a_crct_alr_res (701)

Assignment of a speech circuit which has already been allocated.

3. a_crct_conn_err (702)

Connection error in marker while connecting an A interface speech circuit.

4. rc0_crct_conn_timeout (703)

Timeout in the RC0PRB while connecting an A interface speech circuit.

5. access_out_of_crct_tbl (704)

Requested speech circuit not found in the circuit control table.

6. a_crct_rel_err (705)

An error caused by the SCCP prohibited status. The situation has been detected by the SC7PRB.

Circuit release error in marker while releasing an A interface speech circuit.

7. rc0_transc_or_rate_unava (706)

The requested channel rate corresponding to the A interface circuit pool has not been defined on the A interface.

8. rc0_cip_type_mismatch (707)

The circuit type A is totally contradictory with the TCH channel rate requirement or the data rate requirement implies the circuit pool change.

9. rc0_inv_msg_contents (708)

The radio interface data rate requirement is totally contradictory with the A interface pool configuration.

10. rc0_req_speech_ver_unava (709)

BSC has received either an Assignment Request or a Handover Request message containing speech codec versions none of which are supported by the BSC.

11. rc0_hunting_queue_full (710)

There is no free place for the call in the hunting queue.

12. rc0_a_crct_congestion (711)

There is no free circuit for the call.

13. rc0_a_search_error (712)

The content of the hunting request message is invalid.

14. rc0_crct_pool_mismatch (713)

The hunted circuit is from the wrong circuit pool.

15. rc0_rej_due_eme_call (714)

The hunting queue is full. An emergency call has taken priority over the ordinary call.

16. rc0_ilc_file_error (715)

A interface circuit reservation fails because no pool is available on the hunting list.

Causes set by the Handover Attempt Supervisor Program Block (HASPRB)

1. ho_not_allowed (500)

External handover was not allowed during a FACCH call setup, external DR handover was disabled, or all candidate cells for an external handover were n-areas of the extended cells.

2. no_radio_res_avail (501)

No radio resources in the BTS for channel reservation during handover signalling.

3. no_resp_from_coprocess (503)

Signalling with the internal processes has failed during handover signalling.

4. no_resp_to_radio_res_req (504)

Target channel reservation has failed during handover signalling. No answer to the radio resource request.

5. has_state_conflict (505)

Target channel reservation has failed. Channel activation acknowledgement has not been received, a timer for that has expired.

6. clear_cmd_not_received (506)

No clear command has been received from the A interface during external source handover signalling.

7. ms_is_lost (507)

The timer t3107, t3103 or t9113 has expired. The assignment complete or handover complete message has not been received. The MS has not established a channel to the target side.

8. no_resp_to_ho_cpl_msg (508)

Problems in sending the handover performed message by the BSC.

9. has_switchover (509)

Switchover has been started and the handover has failed.

10. target_fail (510)

Failure in the target channel.

11. source_fail (511)

Failure in the source channel.

12. has_call_control (512)

The master has failed to create a hand.

13. adj_cell_id_err (513)

The handover attempt was interrupted when the BSC noticed that the target cell information (BCCH frequency and/or BSIC) received in the handover command message from the MSC is not correct. This counter indicates that information in the source BSS Radio Network Configuration Database concerning adjacent cells is wrong.

Causes set by the Mobile Services Switching Centre (MSC)

These causes are possible only during signalling. The BSC cannot observe these if the phase is MM signalling (2) or conversation (15).

1. m_radio_if_mess_fail (900)

2. m_radio_if_fail (901)

3. m_uplink_quality (902)

4. m_uplink_strength (903)

5. m_downlink_quality (904)

6. m_downlink_strength (905)

7. m_distance (906)

8. m_o_and_m_inter (907)

9. m_resp_to_msc_invoc (908)

10. m_call_control (909)

11. m_r_if_f_rev_to_old (910)

12. m_handover_succ (911)

Cause value 0x00 radio interface message failure received from the MSC.

Cause value 0x01 radio interface failure received from the MSC.

Cause value 0x02 uplink quality received from the MSC.

Cause value 0x03 uplink strength received from the MSC.

Cause value 0x04 downlink quality received from the MSC.

Cause value 0x05 downlink strength received from the MSC.

Cause value 0x06 distance received from the MSC.

Cause value 0x07 O and M intervention received from the MSC.

Cause value 0x08 response to MSC invocation received from the MSC.

Cause value 0x09 call control received from the MSC.

Cause value 0x0A radio interface failure, reversion to old channel received from the MSC.

Cause value 0x0B handover successful received from the MSC.

13. m_better_cell (912)

14. m_directed_retry (913)

15. m_equipment_fail (914)

16. m_no_radio_res_avail (915)

17. m_req_terr_res_unava (916)

18. m_ccch_overload (917)

19. m_processor_overload (918)

20. m_bss_not_equipped (919)

21. m_ms_not_equipped (920)

22. m_tr_cod_rat_ad_unav (921)

23. m_ciph_alg_not_supp (922)

24. m_terr_chan_alr_allc (923)

Cause value 0x0C better cell received from the MSC.

Cause value 0x0D directed retry received from the MSC.

Cause value 0x20 equipment failure received from the MSC.

Cause value 0x21 no radio resource available received from the MSC.

Cause value 0x22 requested terrestrial resource unavailable received from the MSC.

Cause value 0x23 ccch overload received from the MSC.

Cause value 0x24 processor overload received from the MSC.

Cause value 0x25 bss not equipped received from the MSC.

Cause value 0x26 ms not equipped received from the MSC.

Cause value 0x30 requested transcoding/rate adaption unavailable received from the MSC.

Cause value 0x40 ciphering algorithm not supported received from the MSC.

Cause value 0x50 terrestrial circuit already allocated received from the MSC.

25. m_prot_err_b_bsc_msc (924)

26. m_unexpected (925)

Unexpected failure from the MSC.

27. m_invalid_cell (926)

28. m_invalid_msg_cont (927)

29. m_ie_or_field_missing (928)

30. m_incorrect_value (929)

31. m_unknown_msg_type (930)

32. m_unknown_ie (931)

33. m_transc_or_rate_unavail (932)

34. m_cip_type_mismatch (933)

35. m_switch_crc_pool (934)

36. m_speech_version_unavail (935)

37. m_pre_empt_c (936)

Cause value 0x60 protocol error between BSC and MSC received from the MSC.

Cause value 0x27 invalid cell received from the MSC.

Cause value 0x51 invalid message contents received from the MSC.

Cause value 0x52 information element or field missing received from the MSC.

Cause value 0x53 incorrect value received from the MSC.

Cause value 0x54 unknown message type received from the MSC.

Cause value 0x55 unknown information element received from the MSC.

Cause value 0x30 requested transcoding/rate adaption unavailable received from the MSC.

Cause value 0x31 circuit pool mismatch received from the MSC.

Cause value 0x32 switch circuit pool received from the MSC.

Cause value 0x31 requested speech version unavailable received from the MSC.

38. m_traffic_c (937)

Cause value 0x29 preemption received from the MSC.

Cause value 0x0F traffic received from the MSC.

Internal Description of Call related DX causes in BSC

http://127.0.0.1:41403/s10_5e/NED?action=retrieve&identifier=b33ebxxsxx_ns34&edition=2&language=en&coverage=global&encoding=xhtml_1_0&component=data&item=data&pointer=eb33ebxxsxx.ns34-jun261104011#eb33ebxxsxx.ns34-jun261104011

The radio interface data rate requirement is totally contradictory with the TCH channel rate request of the channel type IE included in the normal Assignment Request or Handover Request. In the Assignment Request related to the In Call Modification or the FACCH call setup, the TCH channel rate request or the data rate request are totally contradictory with the type of TCH where the call is maintained.

ID Clear Code300 0 USER_ACT_BLOCK301 1 NETW_ACT_BLOCK302 2 BTS_FAIL_BLOCK303 3 LAPD_FAIL_BLOCK304 4 ABIS_FAIL_BLOCK305 5 ABIS_MSG_CORRUP_TO306 6 ASS_FAIL_MSG307 7 BLOCK_SLAVE308 8 CH_ACT_NACK309 9 CH_ACT_NACK_OM_INTER310 10 CH_ACT_NACK_EQUIP311 11 CH_ACT_NACK_ENCRYP312 12 CH_ACT_NACK_CH_RAD313 13 CH_ACT_NACK_SERV_NOT314 14 CH_ACT_FAIL315 15 CONN_FAIL316 16 CONN_FAIL_RAD_INF_FAIL317 17 CONN_FAIL_RAD_LINK318 18 CONN_FAIL_REM_TRANS319 19 DATA_IND_CORRUP320 20 ERR_IND321 21 ESTAB_IND_FAIL322 22 ESTAB_CONV_FAIL323 23 HO_FAIL324 24 HO_DETECT_FAIL325 25 MODE_MOD_NACK326 26 MODE_MOD_ACK_FAIL327 27 NO_MEAS_RESULT328 28 NO_RESP_FROM_COPRO329 29 PHY_CONT_CONF_FAIL330 30 RCS_ALG_START_ACK331 31 RCS_ALG_CL_ACK_FAIL332 32 RC0_DISCO_IND333 33 RF_CH_REL_ACK_FAIL334 34 REL_IND335 35 REL_IND_FAIL336 36 SIGNALLING_ERROR337 37 STATE_CONFLICT338 38 TYPE_CONFLICT339 39 FORCED_REL340 40 REJ_PHANTOM_RES341 41 OVERLOAD342 42 ABI_SWITCHOVER343 43 SAPI_3_FAIL344 44 PAGING_MSG_FAIL345 45 CH_REQUIRED_FAIL346 46 MODE_MOD_NACK_EQUIP347 47 MODE_MOD_NACK_TRC

348 48 RRM_SERV_REQ_NACK349 49 CH_MODE_MOD_FAIL350 50 ASS_FAIL350 51 DR_FAIL352 52 COPROCESS_FAIL353 53 ERR_REP_ENC_ALG_NOT354 54 ERROR_REPORT355 55 CH_ACT_NACK_CH_MODE356 56 CH_ACT_NACK_GEN_IE357 57 SPEECH_VERSION358 58 IGNORED_DOUBLE_RAND359 59 SPARE400 60 TIMING_ADVANCE401 61 RRM_SWITCH_CRC_POOL402 62 RRM_SPEECH_VER403 63 SPARE404 64 SPARE500 65 HO_NOT_ALLOWED501 66 NO_RADIO_RES_AVAIL502 67 RESTORE_OLD503 68 NO_RESP_FROM504 69 NO_RESP_TO_RADIO_RES505 70 HAS_STATE_CONFLIGT_C506 71 CLEAR_CMD_NOT507 72 MS_IS_LOST508 73 NO_RESP_TO_HO_CPL_MSG509 74 HAS_SWITCHOVER510 75 TARGET_FAIL511 76 SOURCE_FAIL512 77 HAS_CALL_CONTROL513 78 ADJ_CELL_ID_ERR514 79 SPARE515 80 SPARE516 81 SPARE517 82 SPARE518 83 SPARE519 84 SPARE600 85 AIV_HAND_ACT_FAIL601 86 AIV_SSP602 87 SCCP_CONN_FAIL603 88 SCCP_CONN_TIMEOUT604 89 SCCP_RELEASE605 90 SPARE606 91 GLOBAL_RESET607 92 SPARE608 93 NO_DTAP_FROM_MSC609 94 HO_DENIED_ASSIGN610 95 HO_DENIED_CIPHERING611 96 HO_DENIED_CLEAR

612 97 HO_DENIED_NO_SCCP613 98 T7_EXPIRY614 99 T10_EXPIRY615 100 AIV_CRCT_RE_TIMEOUT616 101 AIV_CRCT_CONN_TIMEOUT617 102 AIV_CRCT_DISCONN618 103 AIV_CRCT_REL_TIMEOUT619 104 AIV_TIMEOUT620 105 ACT_CTRL_TIMEOUT621 106 INVALID_BSSMAP_MSG622 107 UNKNOWN_A_PCM623 108 HO_DENIED_NO_PROPER624 109 CH_TYPE_MISMATCH625 110 AIV_TRANSC_OR_RATE626 111 AIV_SPEECH_VERSION627 112 SPARE628 113 SPARE629 114 SPARE700 115 RC0_HAND_ACT_FAIL701 116 A_CRCT_ALR_RES702 117 A_CRCT_CONN_ERR703 118 RC0_CRCT_CONN704 119 ACCESS_OUT_OF_CRCT705 120 A_CRCT_REL_ERR706 121 RC0_TRANSC_OR_RATE707 122 RC0_CIP_TYPE_MISMATCH708 123 RC0_INV_MSG_CONTENTS709 124 RC0_REQ_SPEECH_VER710 125 SPARE711 126 SPARE712 127 SPARE713 128 SPARE714 129 SPARE800 130 A_TSL_USER_MISMATCH801 131 SC7_CRCT_RES_TIMEOUT802 132 SC7_CRCT_CONN_TIMEOUT803 133 SC7_CRCT_DISCONN804 134 SC7_CRCT_REL_TIMEOUT805 135 A_TSL_BLOCKED806 136 A_TSL_STATUS_UNKNOWN807 137 LSI_ACCESS_FAIL808 138 SCC_ACCESS_FAIL809 139 UNDEF_TSL_IN_LSI810 140 CRCT_EQUIPMENT_FAIL811 141 RESET_CRCT812 142 SPARE813 143 SC7_SSP814 144 SPARE815 145 A_PCM_FAULT

816 146 SPARE817 147 A_CRCT_REMOVED818 148 SPARE819 149 A_ET_STATE_CHANGE820 150 SPARE821 151 SPARE822 152 SPARE823 153 SPARE824 154 SPARE825 155 SPARE826 156 SPARE827 157 SPARE828 158 SPARE829 159 SPARE900 160 M_RADIO_IF_MESS_FAIL901 161 M_RADIO_IF_FAIL902 162 M_UPLINK_QUALITY903 163 M_UPLINK_STRENGTH904 164 M_DOWNLINK_QUALITY905 165 M_DOWNLINK_STRENGTH906 166 M_DISTANCE907 167 M_O_AND_M_INTER908 168 M_RESP_TO_MSC_INVOC909 169 M_CALL_CONTROL910 170 M_R_IF_F_REV_TO_OLD911 171 M_HANDOVER_SUCC912 172 M_BETTER_CELL913 173 M_DIRECTED_RETRY914 174 M_EQUIPMENT_FAIL915 175 M_NO_RADIO_RES_AVAIL916 176 M_REQ_TERR_RES_UNAVA917 177 M_CCH_OVERLOAD918 178 M_PROCESSOR_OVERLOAD919 179 M_BSS_NOT_EQUIPPED920 180 M_MS_NOT_EQUIPPED921 181 M_TR_COD_RAT_AD_UNAV922 182 M_CIPH_ALG_NOT_SUPP923 183 M_TERR_CHAN_ALR_ALLC924 184 M_PROT_ERR_B_BSC_MSC925 185 M_UNEXPECTED926 186 M_INVALID_CELL927 187 M_INVALID_MSG_CONT928 188 M_IE_OR_FIELD_MISSING929 189 INCORRECT_VALUE930 190 UNKNOWN_MSG_TYPE931 191 UNKNOWN_IE932 192 M_TRANSC_OR_RATE933 193 M_CIP_TYPE_MISMATCH934 194 M_SWITCH_CRC_POOL

935 195 M_SPEECH_VERSION936 196 SPARE937 197 SPARE938 198 SPARE939 199 SPARE940 200 SPARE

DX cause phases of Call related DX causes in BSC

Paging/initial MS on CCCH

The ABIPRB is responsible for this phase.

In this phase, the MS gains access to the network, and the ABIPRB sets the cause of establishment to the cause field of a DX cause. The success cause is conveyed to the next phase if the signalling is finished successfully in this phase.

When a failure has occurred, the success cause is overwritten with the failure cause and the signalling continues as call clearing. The failure counter is updated by the RRMPRB (Radio Resource Management Program Block) or, in some cases, also by the ABIPRB.

Figure: Phase 1 of DX causes

MM signalling

The DX cause phase 2 covers the MM signalling between the mobile subscriber and the MSC. The MM signalling is transparent for the BSC occurring on an SDCCH or TCH.


The successful cause is received from the previous phase and the same cause is conveyed to the following phase.

The DX cause phase 1 covers the starting signalling of the mobile originating and the mobile terminating call establishment. The dedicated channel can be an SDCCH (stand-alone dedicated control channel) or TCH .


When a failure has occurred, the successful cause is overwritten with the failure cause and the signalling is continued as call clearing. The RRMPRB updates the failure counter.



Basic Assignment

The DX cause phase 3 covers the mobile subscriber assignment signalling from the SDCCH to the TCH by means of the Basic Call Setup.





Release

The DX cause phase 4 covers the release on an SDCCH or a TCH.


When a failure has occurred during this phase, only one of the BSC clear code counters is updated. The service level counters are not updated, because failures in this phase do not affect the service of the MS.


FACCH assignment

The DX cause phase 5 covers the FACCH call setup assignment signalling. The dedicated channel can only be a TCH.

When a clear command is received from the MSC, the AIVPRB knows that the release is either normal or abnormal (normal means that the MSC has released the channel, for example, at the end of the location update or at the end of the call). In a normal release, the AIVPRB sets the cause to normal_rel_c and sends the appropriate message to the ABIPRB within the DX cause. The ABIPRB checks the DX cause of the message and decides whether to update the counter. Because of the normal_rel_c , the ABIPRB updates the establishment counter and the success counter with the other DX cause (success DX cause for establishment), which has been received from the previous phase.





SMS establishment on TCH

The DX cause phase 6 covers the SMS establishment signalling of a TCH. The dedicated channel can only be a TCH.





SMS establishment on SDCCH

The DX cause phase 7 covers SDCCH SMS establishment. The dedicated channel can only be an SDCCH.





Ciphering

The DX cause phase 8 covers ciphering signalling. The dedicated channel can be an SDCCH or a TCH.





External handover for source side

The DX cause phase 9 covers the external handover signalling of the source side on an SDCCH and a TCH.

The HASPRB is responsible for this phase.

When a failure has occurred before the clear command from the MSC, the success cause is overwritten. The signalling continues as handover clearing and the RRMPRB or, in some cases, also the HASPRB updates the failure counter.

When the failure has occurred after a clear command from the MSC, no failure counters are updated because the MS has not observed that kind of failure (the success DX cause counter has been updated because the MS has been released immediately after the clear command).

When the MSC sends a clear command with the relevant failure cause, the cause is converted into a DX cause and the RRMPRB updates the failure counter.

The MS and the BTS send the measurement results to the BSC. With these measurement results, the RCSPRB decides whether the handover is performed. When the handover conditions are met, the RCSPRB sets the cause for the handover and sends the appropriate signalling message forward, including the DX cause.

The HASPRB checks the cause of the handover and decides that an external handover is to be made. After this decision, the HASPRB converts the cause for the appropriate type of handover. The MSC indicates that the signalling has been successfully finished by means of a clear command message. The BSC receives the clear command. The AIVPRB knows when the clearing is normal and successful. The AIVPRB sets the cause to normal_rel_c and sends the appropriate signalling message forward. The HASPRB updates the successful handover counter and the ABIPRB updates the establishment counter and the success counter with the other DX cause (success DX cause for establishment), which has been received from the previous phase.



Internal handover intra for source side

The DX cause phase 10 covers the internal intra-cell handover signalling of the source side on an SDCCH and a TCH.


The MS and the BTS send the measurement results to the BSC. Based on these measurement results, the RCSPRB decides whether the handover is performed. When the handover conditions are met, the RCSPRB sets the cause for the handover and sends the appropriate signalling message forward, including the DX cause.

The HASPRB checks the cause for the handover and decides that an internal handover should be made. After this decision, the HASPRB converts the DX cause for the appropriate handover.

On the source side, the ABIPRB sends the original DX cause (success DX cause for establishment) via the HASPRB to the target ABIPRB. It is taken into use on the target side after the handover signalling has finished successfully.

The HASPRB updates the successful handover counter and the call continues as a normal call on the target side.

When a failure has occurred on the source side before the assignment command, the success cause is overwritten and the signalling continues as call clearing. The failure counter is updated by the RRMPRB.

On the target side, the HASPRB sets the cause to source_fail_c. No failure counters are updated because only one counter is updated for each failure. (The RRMPRB has updated the failure counter on the source side.)


Internal handover inter for source side

The DX cause phase 11 covers the internal inter-cell handover signalling for the source side on an SDCCH or a TCH.



External handover for target side

The DX cause phase 12 covers the external handover signalling for the target side on an SDCCH and a TCH.


The BSC receives the HO_REQUEST message with the relevant handover cause. The AIVPRB sends the appropriate signalling message to the HASPRB, including the DX cause. The HASPRB converts the cause into the relevant DX cause for the external handover. When the signalling is finished successfully, the HASPRB updates the handover success counter, and the DX cause is conveyed to the following phase.

When a failure has occurred, the successful DX cause is overwritten and the signalling continues as handover clearing. The failure counter is updated by the RRMPRB or, in some cases also by the HASPRB.

The success and failure cases happen as described in Internal handover intra for source side .



Internal handover intra for target side

The DX cause phase 13 covers the internal intra-cell handover signalling for the target side on an SDCCH and a TCH.


A failure has occurred before the assignment has been completed on the target side. The appropriate failure counter is updated. The MS is able to return to the old channel. If it returns to the old channel, it sends an assignment failure. This kind of situation only affects informative counters.

When the failure has occurred after the assignment has been completed on the target side, the success cause is overwritten and the signalling continues as call clearing.

See Internal handover intra for source side for a successful case.

The HASPRB sets restore_old_c as the cause and sends it to the ABIPRB. The source side ABIPRB receives the DX cause and the original establishment cause is restored. The signalling continues on the old channel.

If the MS does not return to the old channel (the MS is lost), the HASPRB sets the source_fail_c as the cause and sends it to the target side ABIPRB. Call clearing is started with the real failure cause on the source side and the failure counter is updated by the RRMPRB.



Internal handover inter for target side

The DX cause phase 14 covers the internal inter-cell handover signalling for the target side on an SDCCH or a TCH.



Conversation

The DX cause phase 15 covers MM signalling between the MS and the MSC during conversation on a TCH.

The success and failure cases happen as described in Internal handover intra for target side .


The ABIPRB is responsible for this phase. This phase starts when the BSC receives the CONNECT_ACK message.

The successful DX cause is received from the previous phase and the same DX cause is conveyed to the following phase.

When a failure has occurred, the successful DX cause is overwritten with the failure cause and the signalling is continued as call clearing. The RRMPRB updates the failure counter.




The DX cause phase 2 covers the MM signalling between the mobile subscriber and the MSC. The MM signalling is transparent for the BSC occurring on an SDCCH or TCH.


The DX cause phase 1 covers the starting signalling of the mobile originating and the mobile terminating call establishment. The dedicated channel can be an SDCCH (stand-alone dedicated control channel) or TCH .



The DX cause phase 3 covers the mobile subscriber assignment signalling from the SDCCH to the TCH by means of the Basic Call Setup.



When a failure has occurred during this phase, only one of the BSC clear code counters is updated. The service level counters are not updated, because failures in this phase do not affect the service of the MS.

The DX cause phase 5 covers the FACCH call setup assignment signalling. The dedicated channel can only be a TCH.




The DX cause phase 6 covers the SMS establishment signalling of a TCH. The dedicated channel can only be a TCH.









When the MSC sends a clear command with the relevant failure cause, the cause is converted into a DX cause and the RRMPRB updates the failure counter.




The DX cause phase 10 covers the internal intra-cell handover signalling of the source side on an SDCCH and a TCH.


The HASPRB checks the cause for the handover and decides that an internal handover should be made. After this decision, the HASPRB converts the DX cause for the appropriate handover.


The HASPRB updates the successful handover counter and the call continues as a normal call on the target side.

When a failure has occurred on the source side before the assignment command, the success cause is overwritten and the signalling continues as call clearing. The failure counter is updated by the RRMPRB.

On the target side, the HASPRB sets the cause to source_fail_c. No failure counters are updated because only one counter is updated for each failure. (The RRMPRB has updated the failure counter on the source side.)

The DX cause phase 11 covers the internal inter-cell handover signalling for the source side on an SDCCH or a TCH.

The DX cause phase 12 covers the external handover signalling for the target side on an SDCCH and a TCH.


When a failure has occurred, the successful DX cause is overwritten and the signalling continues as handover clearing. The failure counter is updated by the RRMPRB or, in some cases also by the HASPRB.

The DX cause phase 13 covers the internal intra-cell handover signalling for the target side on an SDCCH and a TCH.


When the failure has occurred after the assignment has been completed on the target side, the success cause is overwritten and the signalling continues as call clearing.

as the cause and sends it to the ABIPRB. The source side ABIPRB receives the DX cause and the original establishment cause is restored. The signalling continues on the old channel.

source_fail_c as the cause and sends it to the target side ABIPRB. Call clearing is started with the real failure cause on the source side and the failure counter is updated by the RRMPRB.

The DX cause phase 14 covers the internal inter-cell handover signalling for the target side on an SDCCH or a TCH.

The ABIPRB is responsible for this phase. This phase starts when the BSC receives the CONNECT_ACK message.

The successful DX cause is received from the previous phase and the same DX cause is conveyed to the following phase.

When a failure has occurred, the successful DX cause is overwritten with the failure cause and the signalling is continued as call clearing. The RRMPRB updates the failure counter.













as the cause and sends it to the target side ABIPRB. Call clearing is started with the real failure cause on the source side and the failure counter is updated by the RRMPRB.

and sends the appropriate message to the ABIPRB within the DX cause. The ABIPRB checks the DX cause of the message and decides whether to update the counter. Because of the normal_rel_c , the ABIPRB updates the establishment counter and the success counter with the other DX cause (success DX cause for establishment), which has been received from the previous phase.



and sends the appropriate message to the ABIPRB within the DX cause. The ABIPRB checks the DX cause of the message and decides whether to update the counter. Because of the normal_rel_c , the ABIPRB updates the establishment counter and the success counter with the other DX cause (success DX cause for establishment), which has been received from the previous phase.


, the ABIPRB updates the establishment counter and the success counter with the other DX cause (success DX cause for establishment), which has been received from the previous phase.

and sends the appropriate signalling message forward. The HASPRB updates the successful handover counter and the ABIPRB updates the establishment counter and the success counter with the other DX cause (success DX cause for establishment), which has been received from the previous phase.

, the ABIPRB updates the establishment counter and the success counter with the other DX cause (success DX cause for establishment), which has been received from the previous phase.

and sends the appropriate signalling message forward. The HASPRB updates the successful handover counter and the ABIPRB updates the establishment counter and the success counter with the other DX cause (success DX cause for establishment), which has been received from the previous phase.

BSS Clear Codes NSN

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abis interface

downlink rx

slow moving

uplink rx

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