Transcript
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Evolution SeriesUser Manual
Maintenance
B4065 Rev. D
This manual is the property of Nera Networks AS. No parts of the manual may be copied, rewritten or distributed to third parties without the
written permission from Nera Networks AS.
In addition to the WEB edition
the manual is available in
paper format
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The manual is divided in 5 main parts:
General
Installation
Operation
Maintenance
Appendices
This part gives a general overview of the Evolution Series equipment
Gives the details on how to install the equipment
Describes how to operate the system with emphasis on the Evolution Series Manager
Gives details on maintenance of the equipment
A collection of frequency plans, alarm lists, technical specifications etc.
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Table of Contents
General
Installation
Operation
MaintenanceFault FindingBlock Schematic Fault Finding
Front Panel Alarm diagnostics
Unit ReplacementIFU Replacement
IFU Units
SU Replacement
Appendi ces
Click on the to expand
the menu
Home
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Fault Finding
These procedures describe the most common fault-situations.
It is important to find the defective unit in order to minimize time consumption for fault finding and traffic downtime. This is normally done based on alarms, meter readings and looping fromEvolution Manager.It is impossible to make a block schematic that covers all possible faults, therefore the following block-diagrams only cover the most common problems.
Note! The fault-finding needs to be performed by skilled engineers.
It is also important to have system-knowledge and skills in the use of Evolution Manager tools like looping-facilities, alarm and performance logs.Potentional problems are also related to installation of IFU-ODU cables and connectors. Water penetration, lightening, or mechanical stress, may give IFU-ODU cable-problems. Sometimes it isdifficult to find the reason for the problem since a faulty cable, connector, power supply and different ODU-faults are giving exactly the same alarm-picture in Evolution Manager. Normally when the
link connection is lost, the alarm-information from the remote station is also lost.Check if the IFU-ODU cable is shorted or open, by measuring the resistance on the IFU-side of the cable. It is also recommended to measure -48 V on the IFU connector as well as on the ODUside of the cable.Whenever unscrewing the connector on the ODU, make sure that it is always reconnected properly and protected from water penetration, by using the rubber sleeve or vulcanizing tape.
Block Schematic Fault Finding
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Diagram 1, Fault Finding by Looping
Block Schematic Fault Finding
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Diagram 2, RF problems
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Diagram 3, Rx level problems
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Diagram 4, Nominal Rx level problems
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A red LED indicates alarm status on the unit. A blinking red LED indicates that the speciffic unit is placed in wrong slot according to"Unit Housekeeping".
Complete LED description for each unit is described in sectionGeneral/System Overview/IFU Overview.The SU LED will in addition act as a system alarm. If one of the AUX, Plug-in, RIU or FAN units have alarm, the SU will also indicate the alarm situation.The following alarm severities will give alarm indication on the front panel:
MINOR
MAJOR
CRITICALFor a complete alarm lists seeAppendices/Alarm Lists
Example1
Example2
Example3
Alarm Name Descript ion Solut ion
SUBUS LINK Ethernet Link alarm between SU and IFU
Basic Frame
Remove and re-insert SU in IFU Basic
Frame. If alarm condition persists - replace
SU or IFU Basic Frame
CONFIGURATION FAILURE Configuration of SU failed Remove and re-insert SU in IFU Basic
Frame. If alarm condition persists -replace
SU unit
The following alarms areEthernet alarms, onlyrelevant when the NE is
configured in IP mode
------------------------------------------------- ---------------------------------------------------
SU
Front Panel Alarm Diagnostics
This is a simple procedure based on Unit-front LED and alarm status.The alarm status can be monitored from theEvolution Manager, Fault page.No units in the Evolution Series equipment is intended for field repair. A faulty unit is to be replaced with a new unit according to the requirements in the"Unit replacement"chapter.
Note! Check all cable connections and that all units are completely seated in the IFU Basic Frame housing before further troubleshooting is performed.
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HP-TIM / TIM-P SDH Higher order Path Trace Identifier
Mismatch (VC-4) / SONET Higher order Path
Trace Identifier Mismatch (STS-3c SPE)
Verify configuration of Trace Identifier on
transmit and receive side. If conflict, verify
VC-4 trail including cables and X-connections
LINK LOSS Ethernet (ETH2 port on SU front) link loss Check Ethernet cable or peripheral
equipment
FORCED LINK LOSS Ethernet (ETH2 port on SU front) is forced
down due to remote side link loss
If no Radio Link alarms on either side of the
hop - check ethernet cable or peripheral
equipment on remote side of the hop
LOC Signal from IFU Basic Frame to SU is
squelched or defect
If no other Radio Link alarms - replace SU or
IFU Basic Frame
OOF Out OF Frame from IFU Basic Frame to SU If no other Radio Link alarms - replace SU or
IFU Basic Frame
The following alarms are
system alarms and do no tindicate a faulty SU:
------------------------------------------------- ---------------------------------------------------
LOST CONTACT Communication between SU and IFU Basic
Frame failed
Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - unplug power cables
on the current IFU Basic Frame and
reconnect the cables. If alarm situation
persists - replace IFU Basic Frame
CONFIGURATION FAILURE Configuration of IFU Basic Frame failed Check for "SUBUS LINK" or"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - unplug power cables
on the current IFU Basic Frame and
reconnect the cables. If alarm situation
persists - replace IFU Basic Frame
AIS-INSERT Signal from Line Interface Unit or SU to IFU
Basic Frame squelched or defect (transmit
direction, towards radio)
Check alarms on corresponding LIUs and
SU. Handle alarms on these units first. If no
alarms on corresponding LIUs or SU -replace IFU Basic Frame
RX FAILURE Signal from RIU to IFU Basic Frame
squelched or defect (receive direction, from
radio)
Check alarms on corresponding RIUs. Handle
alarms on these units first. If no alarms on
corresponding RIUs - replace RIU or IFU
Basic Frame
LOF STM-1/STS3 Loss Of Frame This alarm will only occur in combination with
other Radio Link Alarms. Handle the other
alarms first. If alarm condition persists -
change IFU Basic Frame
RS-TIM / TIM-S Regenerator Section Trace Identifier
Mismatch
Verify configuration of Trace Identifier on
transmit and receive side. If configurations
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are matching - verify STM-1/STS-3(OC-3)
trail including cables and X-connections See
Evolution Manager IFU Basic Frame Path
Trace
PDH SYNCLOSS ALARM PDH Loss Of Frame This alarm will only occur in combination with
other Radio Link Alarms. Handle the other
alarms first. If alarm condition persists -change IFU Basic Frame
RPS SET TX MUTE FAILED Setting of mute Tx signal on ODU failed This alarm will only occur in combination with
other Radio Link Alarms. Handle the other
alarms first. If alarm condition persists - report
fault situation to Nera Networks
RPS CHAN NOT ALIGNED RPS receive switch failure due to no
alignment
This alarm will only occur in combination with
other Radio Link Alarms. Handle the other
alarms first. If alarm condition persists - verify
Radio Link Path delay difference between thechannels
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EOW
Al arm Name Descri pt io n Solut io n
LOST CONTACT Communication between SU and EOW unit
failed
Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
EOW unit in IFU Basic Frame. If alarmcondition persists - replace unit
CONFIGURATION FAILURE Configuration of EOW unit failed Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
EOW unit in IFU Basic Frame. If alarm
condition persists - replace unit
OHC LINK LOSS The internal packet channel has an error Remove and re-insert EOW unit in IFU Basic
Frame. If alarm condition persists - replace
unit or IFU Basic Frame
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4x64kb/s
Al arm Name Descri pt io n Solut io n
LOST CONTACT Communication between SU and 64kb/s unit
failed
Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
4x64kb/s unit in IFU Basic Frame. If alarmcondition persists - replace unit
CONFIGURATION FAILURE Configuration of 64kb/s unit failed Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
4x64kb/s unit in IFU Basic Frame. If alarm
condition persists - replace unit
OHC LINK LOSS The internal packet channel has an error Remove and re-insert 64kb/s unit in IFUBasic Frame. If alarm condition persists -
replace unit or IFU Basic Frame
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ACU
Al arm Name Descri pt io n Solut io n
LOST CONTACT Communication between SU and the ACU
failed
Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
ACU unit in IFU Basic Frame. If alarm
condition persists - replace unit
CONFIGURATION FAILURE Configuration of the ACU failed Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
ACU unit in IFU Basic Frame. If alarm
condition persists - replace unit
LIU Optical
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LIU Optical
Al arm Name Descri pt io n Solut io n
LOST CONTACT Communication between SU and LIU failed Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
LIU in IFU Basic Frame. If alarm condition
persists - replace unit
CONFIGURATION FAILURE Configuration of LIU failed Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
LIU in IFU Basic Frame. If alarm condition
persists - replace unit
LOS Loss of input signal to LIU Check cables and cable connectors to
peripheral device. If peripheral device and
cable connectors are ok - replace unit
LOF STM-1/STS-3/OC-3 Loss Of Frame Check cables and cable connectors toperipheral device. If peripheral device and
cable connectors are ok - replace unit
RS-TIM / TIM-S Regenerator Section Trace Identifier
Mismatch
Verify configuration of Trace Identifier on
transmit and receive side. If configurations
are matching - verify STM-1/STS-3(OC-3)
trail including cables and X-connections. See
Evolution Manager LIU Path Trace
AIS INSERT AIS inserted towards Line Out Check other Radio Link alarms. Handle
alarms on these units first. If no alarms -
replace LIU or IFU Basic Frame
Tx Laser Fault Transmit laser failed Replace Optical Line Interface Unit
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LIU El
Al arm Name Descri pt io n Solut io n
LOST CONTACT Communication between SU and LIU failed Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
LIU in IFU Basic Frame. If alarm condition
persists - replace unitCONFIGURATION FAILURE Configuration of LIU failed Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
LIU in IFU Basic Frame. If alarm condition
persists - replace unit
LOS Loss of input signal to LIU Check cables and cable connectors to
peripheral device. If peripheral device and
cable connectors are ok - replace unit
LOF STM-1/STS-3/OC-3 Loss Of Frame Check cables and cable connectors to
peripheral device. If peripheral device and
cable connectors are ok - replace unit
RS-TIM / TIM-S Regenerator Section Trace Identifier
Mismatch
Verify configuration of Trace Identifier on
transmit and receive side. If configurations
are matching - verify STM-1/STS-3(OC-3)
trail including cables and X-connections. See
Evolution Manager LIU Path Trace
AIS INSERT AIS inserted towards Line Out Check other Radio Link alarms. Handle
alarms on these units first. If no alarms -
replace LIU or IFU Basic Frame
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LIU 3xDS3/E3
Al arm Name Descri pt io n Solut io n
LOST CONTACT Communication between SU and LIU 3xDS3/
E3 unit failed
Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
LIU in IFU Basic Frame. If alarm condition
persists - replace unit
CONFIGURATION FAILURE Configuration of LIU 3xDS3/E3 unit failed Check for "SUBUS LINK" or"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
LIU in IFU Basic Frame. If alarm condition
persists - replace unit
LOS 01...03 Loss of 3xDS3/E3 input signal Check cables and cable connectors to
peripheral device. If peripheral device and
cable connectors are ok - replace unit
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LIU 25x E1
Al arm Name Descri pt io n Solut io n
LOST CONTACT Communication between SU and LIU 25xE1
unit failed
Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
LIU in IFU Basic Frame. If alarm condition
persists - replace unit
CONFIGURATION FAILURE Configuration of LIU 25xE1 unit failed Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
LIU in IFU Basic Frame. If alarm condition
persists - replace unit
LOS 01...25 Loss of E1 input signal Check cables and cable connectors to
peripheral device. If peripheral device and
cable connectors are ok - replace unit
Gi bit Eth t
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Gigabit Ethernet
Al arm Name Descri pt io n Solut io n
LOST CONTACT Communication between SU and Gigabit
Ethernet unit failed
Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
the Gigabit Ethernet unit in IFU Basic Frame.
If alarm condition persists - replace unit
CONFIGURATION FAILURE Configuration of Gigabit Ethernet unit failed Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
the Gigabit Ethernet unit in IFU Basic Frame.
If alarm condition persists - replace unit
VCG-[1..8] DOWN All members of VCG is down Check for other Radio Link alarms. If no other
Radio Link alarms are present - verify VCGconfiguration on both sides of the connection
VCG-[1..8] DEGRADED Some members of VCG is down Check for other Radio Link alarms. If no other
Radio Link alarms are present - verify VCG
configuration on both sides of the connection
ETH LINK LOSS Traffic Ethernet link down Check Ethernet cable(s) or periferal
equipment
FORCED LINK LOSS Traffic Ethernet link is forced down due to
remote link loss
If no Radio Link alarms on either side of the
hop - check ethernet cable or peripheralequipment on remote side of the hop
DXC
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DXC
Al arm Name Descri pt io n Solut io n
LOST CONTACT Communication between SU and DXC unit
failed
Remove and re-insert DXC unit in IFU Basic
Frame. If alarm condition persists - replace
unit
CONFIGURATION FAILURE Configuration of DXC unit failed Check for "SUBUS LINK" or
"CONFIGURATION FAILURE" alarms on the
SU. Handle alarms on SU first. If these
alarms are not present - remove and re-insert
DXC in IFU Basic Frame. If alarm condition
persists - replace unit
OOF STM-1 / STS-3 / OC-3 Out Of Frame Remove and re-insert DXC unit in IFU Basic
Frame. If alarm condition persists - unplug
and reconnect power cable(s)
LOC Loss Of Clock Remove and re-insert DXC unit in IFU Basic
Frame. If alarm condition persists - unplug
and reconnect power cable(s)
RIU
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Alarm Name Description Solut ion
LOST CONTACT Communication between SU andRIU failed
Check for "SUBUS LINK" or"CONFIGURATION FAILURE"alarms on the SU. Handle alarms onSU first. If these alarms are notpresent - remove and re-insert RIU in
IFU Basic Frame. If alarm conditionpersists - replace unit
CONFIGURATIONFAILURE
Configuration of RIU failed Check for "SUBUS LINK" or"CONFIGURATION FAILURE"alarms on the SU. Handle alarms onSU first. If these alarms are notpresent - remove and re-insert RIU inIFU Basic Frame. If alarm condition
persists - replace unit
LBER Estimated Bit Error Rate is aboveconfigured threshold
Check other Radio Link alarms -Handle these alarms first. If no otheralarms - check RF input level onODU connected to this RIU. If RFinput level ok - check antenna(re-adjust)and RF path
HBER Estimated Bit Error Rate is aboveconfigured threshold Check other Radio Link alarms -Handle these alarms first. If no otheralarms - check RF input level onODU connected to this RIU. If RFinput level ok - check antenna(re-adjust)and RF path
DEMOD SYNC LOSS Demodulator is out ofsynchronization
Check other Radio Link alarms -Handle these alarms first. If no other
alarms - check RF input level onODU connected to this RIU. If RFinput level ok - check antenna
RIU
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(re-adjust)and RF path
ODU LOST CONTACT Communication from ODU to RIUfailed
Disconnect and reconnect IFU-ODUcable. If alarm persists - checkcables and connectors and -48VDC
to ODUTX FAILURE Missing signal from IFU Basic Frame Check if IFU Basic Frame has
"CONFIGURATION FAILURE"alarm. If not - replace RIU or IFUBasic Frame
ODU POWER FAILURE -48V to ODU is shut down Disconnect and reconnect IFU-ODUcable. If alarm persiste - checkIFU-ODU cable and connectors forshort circuits. If cable ok, there is adefect in either RIU or ODU - replaceRIU or ODU
EXT AGC AT MAX Signal power level from ODU to RIUis below limit
Check IFU-ODU cable for excessiveloss (may be due too cable length orcable quality). If cable ok, there is adefect in RIU or ODU - replace RIU
or ODUADC OVERRANGE Signal power level from ODU to RIU
is above limitDefect RIU or ODU - replace RIU orODU
XPIC SYNC LOSS Signalling between RIUs for XPIChas failed
Missing signal from the other RIU onthe other polarization. Remove andreinsert both RIUs. If alarm situationpersiste - replace one RIU at thetime (start with the RIU with alarm). If
alarm situation persists - replase IFUBasic Frame
ODU
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Al arm Name Descri pt io n Solut io n
NEED CONFIGURATION ODU configuration is missing Unplug and reconnect power cable. If alarm
condition persists - replace ODU
LOST CONTACT Communication between SU and ODU failed Check cable and connectors. Check surge
arrestors if mounted.
TX LO Transmitter local oscillator failure Unplug and reconnect power cable. If alarmcondition persists - replace ODU
RX LO Receiver local oscillator failure Unplug and reconnect powercable. If alarmcondition persists - replace ODU
CABLE LOF Signal from RIU not received properly in the
ODU
Check IFU-ODU cable for excessive loss
(may be due too cable length or cable quality).
If cable ok, there is a defect in RIU or ODU -
replace RIU or ODU
TRANSMITTER FAILURE Transmitter power amplifier is overheated Check airflow around the ODU. If airflow isOK and alarm status persists - change ODU
RF OUTPUT TOO LOW Measured RF Output level is below setting Disconnect and reconnect power cable. If
alarm condition persists - replace ODU
ATPC LOOP BROKEN ATPC feedback signal from remote receiver
failed
Normally due to other Radio Link alarm. If no
other Radio Link alarms - disconnect and
reconnect power cable. If alarm condition
persists - replace ODU
RF INPUT LOS RF input signal level is below critical limit May be due to weather/atmosphericalconditions, orantennas need re-adjustment
POWER SUPPLY FAILURE One or more of the secondary (internal)
powersources out of order
Check voltage level on ODU connector (-40.5
to -57 VDC). If voltage level within spec. -
replace ODU
FAN
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Al arm Name Descri pt io n Solut io n
FAN ALARM Combined alarm for the 3 fans on the Fan
unit. Fan speed is too low
Change FAN Unit - If alarm condition persists
- change IFU Basic Frame
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Unit Replacement
The new unit must have exactly the same unit code (Code:) as the unit to be replaced.The unit revision (Rev:) is on the format "R1A" (revision 1A). The new unit must have the same or higher digit (1) on the revision tag to be compatible with the one to be replaced. The letter (A) is notsignificant for interchangeability. See a typical label below:
The Supervisory Unit stores a copy of the configuration and SW for the different units. If a unit is replaced, the configuration will be automatically downloaded from the Supervisory Unit to the newunit.
Note! This equipment contains components which are sensitive to "ESD" (Electro Static Discharge). It is therefore essential that wheneverdisassembling the equipment and/or handling PC
boards, special precautions to avoid ESD are made. These precautions include personnel grounding, grounding of work bench, grounding of tools and instruments as well as transport and storagein special antistatic bags and boxes.
IFU Basic Frame Replacement
Note! When a complete IFU Basic Frame is replaced, the traffic through this IFU will be broken.
1. Unplug the power connector(s) on the RIU unit(s).2. Disconnect all cables on the IFU front carefully. Mark all cables to ensure that the cables can be reconnected to the correct terminals on the new IFU.3. IF the IFU ismounted in an equipment rack, unscrew the IFU from the rack (four screws).4. Pull the IFU out carefully.5. Remove all plug-in units except the Fan unit (the FAN unit is part of the IFU Basic Frame).
Replacement
1. Replace the plug-in units in the spare IFU Basic Frame.2. Insert the new IFU in the Equipment rack (if rack mounted) carefully.
Note! If the IFU is part of a system with more than 2 channels, make sure that the plate, covering the IFU rear connectors, is removed and slide the IFU to enter the corresponding
connectors in the IFU shelf, without the use of excessive force.3. Fasten the four screws.
4. Reconnect the front cables.5. Reconnect the power cable(s).
IFU Units
Note! If the Radio system is protected (1+1, 2+1 etc.), manually switch the protection switching to the functioning channel(see Configuration/RPS/Manual Switch)before a RIU carrying
traffick, is removed from the IFU. Otherwise the traffic can be broken.
For SU replacement, see paragraphSU Replacement.
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1. Unplug all cables on the unit to be replaced.2. Unscrew the two "finger" screws that secure the unit to the IFU. A screwdriver may be used if necessary to unscrew the screws.3. Remove the unit carefully from the IFU by pulling the screws.
Replacement
1. Insert the new unit carefully. Ensure that the unit enters the guides inside the IFU and gently press the unit to enter the internal connectors without the use of excessive force.2. Fasten the two screws with your fingers. Do not use a screwdriver.3. Reconnect all cables.
SU Replacement
In addition to the steps in the paragraph above, it is important that the correct system configuration is reloaded from a backup file when the SU is replaced by a spare unit.(See Operation Section;Evolution Manager/Feature Description/Configuration/Backup)
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