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TeliaSonera Sweden TSS - Networks and Production
Customer premises ADSL modem requirements
Table of contents
1 Scope/Field of application 2
2 Definitions 4
3 Requirements at the line-port of the ADSL modem 5 3.1 ADSL
layer 1 requirements 5 3.2 ATM layer 2 requirements 10 3.3 Protocol
encapsulation 12
4 Requirements at the Ethernet ports of the ADSL modem 12 4.1
Physical interface 12 4.2 Functional requirements 12 4.3
Performance requirements 13
5 General ADSL modem requirements 13 5.1 Default settings 13 5.2
Electrical safety 14
6 Bitstream PRO specific requirements 16 6.1 ADSL layer 1
requirements 17 6.2 ATM layer 2 requirements 18 6.3 Requirements at
the Ethernet ports of the DSL modems 19 6.4 Performance
requirements 20 6.5 General DSL modem requirements 20 6.6 Settings
20 6.7 Electrical safety 21
7 Abbreviations/Acronyms 23
8 References 24
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Revision history
2004-12-15: Rev A. First version.
2005-10-17: Rev B. Main changes:
Up to 120 seconds for training allowed in auto-mode Performance
requirements at Ethernet level changed Performance requirement on
ADSL2+ updated with
Broadband Forum figures Annex M auto-mode to be supported as
default
2006-09-14: Rev C. Alcatel ISAM interoperability.
2008-06-27: Rev D. Bitstream PRO requirements and general
overview of all requirements
2011-01-18: Rev E. Hardware information added for the DSLAM
platforms. Bitrate requirements in CPE 3022 revised.
2011-05-13: Rev F. Requirements for VoIP and IPTV added.
1 Scope/Field of application This document specifies a set of
requirements for an ATU-R supporting different ADSL modes (e.g.
ADSL2+). The specification aims to detail the basic connectivity
requirements at the physical, ADSL, ATM and Ethernet level.
This document specifies the requirements for an ATU-R using
multi-protocol encapsulation of bridge protocols over ATM over ADSL
over PSTN.
All requirements in this specification assume that the ATU-R is
configured in bridge mode. This does not prohibit the inclusion of
additional functionality into the ATU-R, e.g. router or WLAN
functionality.
The objective is to ensure full interoperability between
equipment from different vendors. ATU-C and ATU-R from different
vendors with different hardware chips shall be fully interoperable
with each other.
Nokia D50 interoperability CPE 3001 The ATU-R shall be
interoperable with Nokia D50e type of
DSLAM, with following line cards: eDMT8A3s, eDMT4f, eDMT8-1,
eDMT8-2S
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Alcatel ASAM interoperability CPE 3002 The ATU-R shall be
interoperable with Alcatel 7300 ASAM
type of DSLAM, with following line cards: ADLT-L, ADLT-J,
ABLT-D
Ericsson EDA 1200 interoperability CPE 3003 The ATU-R shall be
interoperable with Ericsson EDA type
of DSLAM, with following IPDSLAMs: EDN312xe, EDN612ef
Alcatel ISAM interoperability CPE 3004 The ATU-R shall be
interoperable with Alcatel ISAM type
of DSLAM, with following line cards: EBLT-E, EBLT-C, NALS-A
ADSL functions
LAN functions
CPE / ATU-R
DSLAMAR
ADSL/ATM
Ethernet2
1
DTEBridge
Other Functionality
Figure 1 ADSL system functionality
Network Provider domain This document specifies two types of
functionality for the ATU-R:
- Functionality related to the ATU-R and its interaction with
the DSLAM, 1)
in figure 1.
- Functionality related to the interaction between ATU-R and
Access Routers (AR) or other network elements e.g. gateways. The
bridged Ethernet ATU-R is depicted as 2) in figure 1.
In figure 1, only a single customer interface is depicted. Some
ATU-R may however support additional customer interfaces as stated
in specific requirements
Usually a POTS splitter is also needed. Requirements for the
splitter are found in [13].
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2 Definitions
Copper pair
Customer premises
Splitter
ATU-RLE DTE
PotsTE
Figure 2 ADSL system reference configuration
Reference configuration: The equipment stationed at the customer
premises consists of a POTS splitter and a modem designated ATU-R.
The ATU-R could be stand-alone equipment or be a part of the Data
Terminal Equipment (DTE). The DTE could e.g. be a PC or local area
equipment such as a router. The local exchange (LE) equipment
contains the ATU-C and a splitter. The ATU-C is the counterpart to
the ATU-R. The LE equipment is often called DSLAM.
ATU-R: The term ATU-R is used when describing CPE functionality
and performance.
ETSI FB: Line impairment type. Details can be found in Broadband
Forum TR-067 [14] or in ETSI TS 101 388 [10].
ETSI Loop #1: Cable type. Details can be found in the ETSI TS
101 388 [10] or in the ITU-T Rec. G.996.1 [7].
ETSI Loop #2: Cable type. Details can be found in the ETSI TS
101 388 [10] or in the ITU-T Rec. G.996.1 [7].
Sync Time: Sync Time is the time interval from the moment when
the modem starts Training, until the moment Showtime is
achieved.
Showtime: The state reached after Training is completed and data
can be transmitted.
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3 Requirements at the line-port of the ADSL modem
3.1 ADSL layer 1 requirements
3.1.1 Physical interface The requirements CPE 3005 - CPE 3011 in
this clause are specific for the protection of POTS and are based
on ETSI ES 202 913 [11].
DC resistance between wires CPE 3005 The DC resistance between
the A- and B-wire at the
line port of the ATU-R shall be > 5 M.
DC resistance to earth CPE 3006 The DC resistance between each
wire and earth at the
line port of the ATU-R shall be > 50 M.
Ringing impedance CPE 3007 The impedance at 25 Hz between the A-
and B-wire at
the line port of the ATU-R shall be > 100 k.
DC current during ringing CPE 3008 The DC current drawn by the
ATU-R line port during the
ringing signal shall be < 0,6 mA when tested with a 25 Hz
ringing voltage of 90 Vrms superimposed on 60 V DC.
Unbalance about earth CPE 3009 The unbalance about earth (LCL)
at the line port of
the ATU-R shall be >54 dB in the range 50-600 Hz and >60
dB in the range 600-3400 Hz.
Impedance in the voice band CPE 3010 The input impedance at the
line port of the ATU-R when tested
with a signal level of 1 Vrms superimposed on 9V DC shall be
>10 k at 200 Hz and 455 Hz and >1137 at 4 kHz.
RJ-11 CPE 3011 The physical interface connecting the ATU-R to
the splitter
shall be an RJ-11 socket. Pin 3 and 4 shall be used for the ADSL
signals. Pin 1, 2, 5 and 6 shall not be used.
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1 6
Figure 3 RJ-11 socket
3.1.2 Functional requirements ADSL1, Annex A
CPE 3012 The ATU-R shall follow the ADSL standard defined in
ITU-T Rec. G.992.1 [1] including Annex A for ADSL over POTS. All
modifications to [1] as specified in ETSI TS 101 388 [13] to cover
the European deployment, shall apply.
ADSL2, Annex A CPE 3013 The ATU-R shall follow the ADSL2
standard defined in
ITU-T Rec. G.992.3 [2] and [3] including Annex A ADSL2 over
POTS. For regional requirements, the European-specific parts shall
apply.
ADSL2, Annex M CPE 3014 For ADSL2 the ATU-R shall follow Annex M
defined in
ITU-T Rec. G.992.3 [2] and [3]. For regional requirements, the
European-specific parts shall apply.
ADSL2+, Annex A CPE 3015 The ATU-R shall follow the ADSL2+
standard defined in
ITU-T Rec. G.992.5 [4] including Annex A for ADSL2+ over POTS.
For regional requirements, the European-specific parts shall
apply.
ADSL2+, Annex M CPE 3016 For ADSL2+ the ATU-R shall follow the
Annex M defined
in ITU-T Rec. G.992.5 [4] and [5]. For regional requirements,
the European-specific parts shall apply.
Frequency division duplex CPE 3017 The ATU-R shall be frequency
division multiplexed
according to ITU-T Rec. G.992.1 [1], G.992.3 [2] and G.992.5
[4].
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Handshake procedures CPE 3018 The ATU-R shall follow the
standard in ITU-T Rec.
G.994.1 [6], which specifies the handshake procedures for
digital subscriber line transceivers.
3.1.3 Performance requirements
Performance requirement for ADSL1 capable ATU-R (fast mode)
CPE 3019 The ATU-R shall conform to the transmission performance
requirements given by Broadband Forum TR-067 clause A.2.3.2 [14],
with exception for interleaved mode performance requirements. The
DSLAM shall be set in ADSL1 automode.
Performance requirement for ADSL2+ capable ATU-R (fast mode)
CPE 3020 The ATU-R shall conform to the transmission performance
requirements given by Broadband Forum TR-100 clause A.2.5.4 Table
A.2-22 [15] with the modifications given below.
The DSLAM shall be set in auto-mode including ADSL1, ADSL2 A/L,
ADSL2+ A.
No code violations (CV) shall be detected during SHOWTIME for
any of the test cases.
Performance requirement for ADSL2+ capable ATU-R (interleaved
mode with INP=2)
CPE 3021 The ATU-R shall conform to the transmission performance
requirements given by Broadband Forum TR-100 clause A.2.5.4 Table
A.2-23 [15] with the modifications given below. The DSLAM shall be
set in auto-mode without Annex M.
No code violations (CV) shall be detected during SHOWTIME for
any of the test cases.
Performance requirement for ADSL2+ capable ATU-R with Annex M
(fast mode)
CPE 3022 The ATU-R shall be capable of providing at least the
bit rate specified in the table below under the test conditions
given by Broadband Forum TR-100 clause A.2.5.4 Table A.2-22 [15]
with the modifications given below. The DSLAM shall be set in
auto-mode.
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ADSL2+ under test in Broadband Forum TR-100 clause A.2.5.4 [15]
is replaced with ADSL2+ Annex M.
No code violations (CV) shall be detected during SHOWTIME for
any of the test cases.
The modem must train within a total of 120 seconds for auto-mode
operation.
Dist (m) Downstream, Annex M (kbit/s)
Upstream Annex M (kbit/s)
100 16000 2450
250 15100 2200
750 14200 2000
1250 12500 1700
1750 9200 1350
2500 3000 850
3250 100 300
ADSL 2+, Annex M performance requirements, fast and interleaved
mode
Performance requirement for ADSL2+ capable ATU-R with Annex M
(interleaved mode with INP=2)
CPE 3023 The ATU-R shall be capable of providing at least the
bit rates specified in the table 2 above under the test conditions
given by Broadband Forum TR-100 clause A.2. 5.4 Table A.2-23 [15]
with the modifications given below. The DSLAM shall be set in
auto-mode.
ADSL under test in Broadband Forum TR-100 clause A.2. 5.4 [15]
is replaced with ADSL2+.
The bit rate requirements shall be as in CPE 3022.
No code violations (CV) shall be detected during SHOWTIME for
each of the test cases.
The modem must train within a total of 120 seconds for auto-mode
operation.
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3.1.4 Management and configuration requirements
Physical layer management CPE 3024 The ATU-R shall support all
mandatory functions in ITU-T
Rec. G.997.1 [8].
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Support for INP and interleaving CPE 3025 The ADSL2+ ATU-R shall
at least support the
INP/interleave combinations marked with grey in the tables
below. The values in the grey cells are the maximum possible
bitrates for each combination according to G.992.5 Amendment 1 [5]
(downstream) and G.992.5 [4] (upstream).
Downstream Max
interleave delay 0 0,5 1 2 4 8 16
1* 29556 2 25718 4 27613 25718 21093 8 26042 22244 14455 8112 16
26042 22244 14455 8112 4024
Upstream Max
interleave delay 0 0,5 1 2 4 8 16
1* 3520 2 3072 4 3264 1728 704 8 1792 832 320 64 16 1792 832 704
128
* 1 ms delay means Sp1 and Dp=1, see the ADSL standards
Rate adaptation CPE 3026 The ATU-R shall be capable to be
configured for rate
adaptive, margin adaptive or power adaptive mode of operation
for both downstream and upstream directions. This shall be
accomplished by control from ATU-C as specified in ITU-T Rec.
G.997.1 [8].
3.2 ATM layer 2 requirements
3.2.1 Functional requirements
ATM over ADSL CPE 3027 The ATU-R shall transport ATM over ADSL,
ADSL2 and
ADSL2+ according to ITU-T Rec. G.992.1 [1], G.992.3 [2] and
G.992.5 [4]. For cell transport, the ATM-specific parts shall
apply.
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UBR CPE 3028 The ATU-R shall support ATM traffic class UBR.
VBR-rt CPE 3029 The ATU-R shall support ATM traffic class
VBR-rt.
VBR-nrt CPE 3030 The ATU-R shall support ATM traffic class
VBR-nrt.
UBR bandwidth allocation CPE 3031 The UBR QoS shall not reserve
any bandwidth e.g. in the
CAC-mechanism.
Three prioritisation queues CPE 3032 The ATU-R shall support
traffic prioritisation with at least
three separate queues in upstream direction.
Simultaneous VBR-rt, VBR-nrt and UBR CPE 3033 It shall be
possible to simultaneously use UBR, VBR-nrt and
VBR-rt ATM traffic on different PVCs between the ATU-R and the
ATU-C.
3.2.2 Performance requirements
Three simultaneous PVC CPE 3034 The equipment shall support the
possibility to set up at least
three simultaneous PVCs between the ATU-R and the ATU-C.
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3.2.3 Management and configuration requirements F5 loop back
CPE 3035 The ATM OAM F5 end-to-end loop-back functionality at
virtual channel level according to ITU-T Rec. I.610 [12] shall be
supported.
OAM only on request CPE 3036 OAM-cells shall only be sent from
the ATU-R upon request
from the ATU-C.
3.3 Protocol encapsulation RFC 2684, LLC
CPE 3037 The equipment shall support RFC 2684, Multiprotocol
Encapsulation over ATM Adaptation Layer 5, section 5.2 LLC/SNAP
Encapsulation of bridge protocols [17].
4 Requirements at the Ethernet ports of the ADSL modem
4.1 Physical interface ATU-R Ethernet port
CPE 3038 The ATU-R shall have at least one physical LAN-port
(RJ45)
4.2 Functional requirements IEEE802.1d, Learning bridge
CPE 3039 The equipment shall support the IEEE 802.1d standard
for transparent learning bridges.
MAC addresses CPE 3040 The learning bridge shall handle at least
255 MAC addresses.
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4.3 Performance requirements Basic throughput for ATU-Rs
CPE 3041 The throughput in downstream direction shall be at
least 6,5 Mbit/s for a packet size of 1500 with simultaneous
upstream throughput of at least 0,45 Mbit/s for a packet size of 64
bytes, all on Ethernet level.
High throughput ATU-Rs CPE 3042 The throughput in downstream
direction shall be at least
18 Mbit/s for a packet size of 1500 bytes with simul-taneous
upstream throughput of at least 0,60 Mbit/s for a packet size of 64
bytes, all on Ethernet level.
High throughput ATU-Rs with extended uplink CPE 3043 The
throughput in downstream direction shall be at least
16 Mbit/s for packet sizes of 1500 bytes with simultaneous
upstream throughput of at least 1,2 Mbit/s for a packet size of 64
bytes, all on Ethernet level.
5 General ADSL modem requirements
5.1 Default settings VP/VC service mapping
CPE 3044 The ATU-R shall have the following default VP/VC
mapping per service :
Service VPI VCI ATM
Internet 8 35 UBR
IPTV 8 45 VBR-nrt
VoIP 8 55 VBR-rt
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5.2 Electrical safety All requirements in this area are provided
here for information only. In the ordinances and standards referred
to there are essential requirements, which are mandatory from a
legal perspective.
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5.2.1 Ordinances concerning electrical equipment
Ordinances, electrical safety CPE 3045 For compliance with the
Low Voltage Directive, 73/23/EEC
the following ordinances apply. The directive is mandatory for
almost all electrical equipment for use at voltage ranges 50-1000 V
AC or 75-1500 V DC. For equipment used in Sweden the voltage ranges
are 0-1000 V AC and 0-1500 V DC.
1) Ordinance concerning Electrical Equipment; (SFS 1993:1068),
in the Swedish Code of Statutes.
2) The National Electrical Safety Boards Regulations concerning
Certain Electrical Equipment; (ELSK-FS 2000:1).
CPE 3046 Equipment, which falls within the voltage ranges above,
shall comply with the requirements stated in the ordinances and
shall be accompanied by suppliers' declaration.
NOTE. In the Ordinances there are essential requirements, which
are legal and therefore mandatory.
5.2.2 Standards
Electrical safety, SS-EN 60 950 CPE 3047 For mains and battery
powered IT equipment connected to
a telecommunications network the requirements stated in SS-EN 60
950 apply. The standard, in accordance with the principles of
safety given in its introduction, covers safety requirements and
compliance criteria such as: 1. Protection of equipment users from
hazards in the equipment. 2. Protection of service personnel
working with the telecommuni-
cation network and other users of the telecommunication network,
from hazardous conditions on the telecommunication network
resulting from the connection of the equipment.
3. Protection of equipment users from voltages in the
telecommunication network.
NOTE. In the standards there are essential requirements, which
are legal and therefore mandatory.
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6 Bitstream PRO specific requirements The CPE has the following
main characteristics
Support for ADSL1/2/2+ including Annex M
Support for 4 ATM service classes
Support for IP QoS (mapping of Diffserv CP to PVC)
Support for Port based QoS
For tagged customer ports
Support for VLAN ID to PVC mapping
Support for p-bit to PVC mapping
The Bitstream PRO offering contains the following services
settings.
Maximum ATM speed (Down/Up) kbps
QoS ADSL operation mode
0.5/0.5 608/608 BE+ ADSL1 Annex A 2/1 2432/1216 BE+ ADSL1 Annex
A 8/1 8128/1216 BE+ ADSL1 Annex A
2/2 Standard 4864/2432 BE+ ADSL2/2+ Annex M 2/2 MIX 4864/2432
BE+, BC+, RT ADSL2/2+ Annex M 2/2 VoIP 4864/2432 BE+, RT ADSL2/2+
Annex M
10/2 Standard 12000/2432 BE+ ADSL2/2+ Annex M 10/2 MIX
12000/2432 BE+, BC+, RT ADSL2/2+ Annex M 10/2 VoIP 12000/2432 BE+,
RT ADSL2/2+ Annex M
24/3 Standard 28480/3008 BE+ ADSL2/2+ Annex M 24/3 MIX
28480/3008 BE+, BC+, RT ADSL2/2+ Annex M 24/3 VoIP 28480/3008 BE+,
RT ADSL2/2+ Annex M
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6.1 ADSL layer 1 requirements
6.1.1 Performance requirements
Performance requirement for ADSL1 capable ATU-R (interleaved
mode)
CPE 3048 The ATU-R shall conform to the transmission performance
requirements given by the table below under the test conditions
given by Broadband Forum TR-067 clause A.2.3.2 [14] with the
modifications given below. The DSLAM shall be set in ADSL1
auto-mode.
No code violations (CV) shall be detected during SHOWTIME for
any of the test cases.
The test shall be made with ETSI Loop #2
Only interleaved mode
Performance requirement for ADSL2+ capable ATU-R with Annex M
(interleaved mode with INP=2)
CPE 3049 The ATU-R shall be capable of providing at least the
bit rate specified in the table below under the test conditions
given by Broadband Forum TR-100 clause A.2.5.4 table A.2-23[16]
with the modifications given below. The DSLAM shall be set in
auto-mode.
ADSL2+ under test in Broadband Forum TR-100 clause A.2.5.4 [16]
is replaced with ADSL2+ Annex M.
No code violations (CV) shall be detected during SHOWTIME for
any of the test cases.
The test shall be made with ETSI loop #2
Only interleaved mode
Dist (m) Downstream
Annex A (kbit/s)
Upstream Annex A (kbit/s)
3500 4800 600
6000 600 160
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Dist (m) Downstream Annex M (kbit/s)
Upstream Annex M (kbit/s)
1300 12000 2400
2700 4800 1700
6.2 ATM layer 2 requirements CBR
CPE 3050 The ATU-R shall support ATM traffic class CBR.
Queue size CBR CPE 3051 The CPE shall support a minimum queue
size of 5 kB ATM
cells for CBR PVCs.
Queue size UBR CPE 3052 The CPE shall support a minimum queue
size of 64 kB
ATM cells for UBR PVCs.
Two prioritisation queues CPE 3053 The ATU-R shall support
traffic prioritisation with at least
two separate queues in upstream direction.
Frame Discard CPE 3054 The ATU-R shall support frame
discard.
ATM scheduling CPE 3055 The ATM scheduling on the uplink shall
at least be able to
take place with strict priority.
ATM shaping per PVC CPE 3056 ATM shaping shall be supported per
PVC.
Shaping of CBR traffic CPE 3057 It shall be possible to shape
CBR traffic to a specific peak
rate.
Overbooking CPE 3058 The uplink shall support capacity being
overbooked. This
includes the case that CBR traffic is part of the uplink.
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6.3 Requirements at the Ethernet ports of the DSL modems
Port type CPE 3059 The Ethernet port on the CPE shall be
possible to
individually configure as untagged or tagged.
IP Precedence / DSCP CPE 3060 The CPE shall support mapping of
both tagged and untagged
Ethernet frames to ATM PVC based on the IP precedence and/or
DSCP values in the IP header. The mapping between IP precedence,
DSCP and PVC shall be configurable. The CPE shall support mapping
of several IP precedence values onto a single PVC.
Transparent forwarding of Ethernet frames on tagged
interfaces
CPE 3061 The CPE shall be capable to transparently forward
Ethernet frames on tagged interfaces.
Transparent forwarding of IP precedence, DSCP CPE 3062 The CPE
shall be capable of transparently forwarding of IP
precedence, DSCP values.
Support for Ethernet scheduling CPE 3063 The CPE shall support
up to 4 Ethernet queues, with
Weigthed Fair Queuing (WFQ).
Packet size on VLAN untagged interfaces CPE 3064 Ethernet frames
up to 1518 bytes shall be possible to
forward over the WAN-interface.
Packet size on VLAN tagged interfaces CPE 3065 Ethernet frames
up to 1522 bytes shall be possible to
forward over the WAN-interface.
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6.4 Performance requirements Packet losses for real time
(CBR)
CPE 3066 No packet losses shall occur for Real Time traffic as
long as the traffic is below its configured rate, even if the sum
of Business Class and Real Time exceeds the line rate. This is
valid up to a sustained UBR rate equal to the DSL line rate and for
100Mbit/s peak rates up to 64 Kbytes in total size for all LAN
interfaces together.
Delay for real time (CBR) CPE 3067 The maximum and average
delay, discounting the
serialization delay, for real time traffic shall always be lower
than business class traffic as long as the class is not
overloaded.
6.5 General DSL modem requirements
6.6 Settings Default settings for Standard QoS
CPE 3068 The ATU-R shall have the following default settings
Class IP Precedence VPI VCI Peak Rate ATM
BE+ 0,1,2,3,4,5,6,7 8 35 Linerate UBR
Default settings for MIX QoS CPE 3069 The ATU-R shall have the
following default settings
Class IP Precedence VPI VCI Scheduler Peak Rate ATM
RT 4,5 8 36 ATM 1640 CBR
BC+ 2,3 8 35 ATM and
Ethernet WFQ (80 %)
Linerate UBR
BE+ 0,1,6,7 8 35 ATM and
Ethernet WFQ (20 %)
Linerate UBR
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Default settings for VoIP QoS CPE 3070 The ATU-R shall have the
following settings
Class IP Precedence VPI VCI Scheduler Peak Rate ATM
RT 4,5 8 36 ATM 1640 CBR
BE+ 0,1,2,3,6,7 8 35 ATM Linerate UBR
6.7 Electrical safety All requirements in this area are provided
here for information only. In the ordinances and standards referred
to there are essential requirements, which are mandatory from a
legal perspective.
6.7.1 Ordinances concerning electrical equipment
Ordinances, electrical safety CPE 3071 For compliance with the
Low Voltage Directive, 73/23/EEC
the following ordinances apply. The directive is mandatory for
almost all electrical equipment for use at voltage ranges 50-1000 V
AC or 75-1500 V DC. For equipment used in Sweden the voltage ranges
are 0-1000 V AC and 0-1500 V DC.
1) Ordinance concerning Electrical Equipment; (SFS 1993:1068),
in the Swedish Code of Statutes.
2) The National Electrical Safety Boards Regulations concerning
Certain Electrical Equipment; (ELSK-FS 2000:1).
CPE 3072 Equipment, which falls within the voltage ranges above,
shall comply with the requirements stated in the ordinances and
shall be accompanied by suppliers' declaration.
NOTE. In the Ordinances there are essential requirements, which
are legal and therefore mandatory.
6.7.2 Standards
Electrical safety, SS-EN 60 950 CPE 3073 For mains and battery
powered IT equipment connected to
a telecommunications network the requirements stated in SS-EN 60
950 apply. The standard, in accordance with the principles of
safety
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given in its introduction, covers safety requirements and
compliance criteria such as: 1. Protection of equipment users from
hazards in the equipment. 2. Protection of service personnel
working with the telecommuni-
cation network and other users of the telecommunication network,
from hazardous conditions on the telecommunication network
resulting from the connection of the equipment.
3. Protection of equipment users from voltages in the
telecommunication network.
NOTE. In the standards there are essential requirements, which
are legal and therefore mandatory.
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7 Abbreviations/Acronyms ADSL Asymmetric Digital Subscriber Line
ATM Asynchronous Transfer Mode ATU-C Access Terminal Unit - Central
ATU-R Access Terminal Unit - Remote CBR Constant (or continuous)
Bit Rate DTE Data Terminal Equipment ITU International
Telecommunication Union OAM Operation, Administration and
Maintenance POTS Plain Old Telephone Service TE Terminal Equipment
PVC Permanent Virtual Circuit UBR Unspecified Bit Rate VBR-nrt
Variable Bit Rate non real time VBR-rt Variable Bit Rate real time
VCI Virtual Channel Identifier VPI Virtual Path Identifier
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8 References [1] ITU-T Recommendation G.992.1 (1999-06);
Asymmetric digital subscriber line (ADSL) transceivers [2] ITU-T
Recommendation G.992.3 (2002-07);
Asymmetric Digital Subscriber Line Transceivers 2 (ADSL2) [3]
ITU-T Recommendation G.992.3 Amendment 2 (2004-04);
Asymmetric digital subscriber line transceivers 2 (ADSL2)
Amendment 2: Amendments to Annex J and new Annexes L and M
[4] ITU-T Recommendation G.992.5 (2003-05); Asymmetric Digital
Subscriber Line (ADSL) transceivers - Extended bandwidth ADSL2
(ADSL2+)
[5] ITU-T Recommendation G.992.5 Amendment 1 (2004-04);
Amendment 1 (new Annexes J and M) to Recommendation G.992.5
[6] ITU-T Recommendation G.994.1 (2003-05); Handshake procedures
for digital subscriber line (DSL) transceivers
[7] ITU-T Recommendation G.996.1 (2001-02); Test procedures for
Digital Subscriber Line (DSL) Transceivers
[8] ITU-T Recommendation G.997.1 (2003-05); Physical layer
management for Digital Subscriber Line (DSL) transceivers
[9] ITU-T Recommendation I.610 (1999-02); B-ISDN Operation and
Maintenance Principles and Functions
[10] ETSI TS 101 388 V1.3.1 (2002-05); Transmission and
Multiplexing (TM); Access transmission systems on metallic access
cables; Asymmetric Digital Subscriber Line (ADSL) - European
specific requirements
[11] ETSI ES 202 913 V1.2.1 (2004-07); Access and Terminals
(AT); POTS requirements applicable to ADSL modems when connected to
an analogue presented PSTN line
[12] ANSI T1.413 Issue 2 (1997-10); Network and Customer
Installation Interfaces-Asymmetric Digital Subscriber Line (ADSL)
Metallic Interface.
[13] TeliaSonera T2682-10 ADSL and VDSL POTS splitters
requirements for TE side, rev 1.0, 2010-02-08
[14] Broadband Forum TR-067 (2004-04); ADSL Interoperability
Test Plan [15] Broadband Forum TR-100 (2007-03); ADSL2/ADSL2plus
Performance Test
Plan [16] IEEE 802.3 (2002)
IEEE Standard for Information technologyTelecommunications
and
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information exchange between systemsLocal and metropolitan area
net-worksSpecific requirements Part 3: Carrier sense multiple
access with collision detection (CSMA/CD) access method and
physical layer specifications
[17] IETF RFC 2684 (1999); Multiprotocol Encapsulation over ATM
Adaptation Layer 5