Evolution Maintenance

8/10/2019 Evolution Maintenance

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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


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


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


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


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


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




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




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


unit or IFU Basic Frame


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4x64kb/s


LOST CONTACT Communication between SU and 64kb/s unit

failed





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




4x64kb/s unit in IFU Basic Frame. If alarm


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


LOST CONTACT Communication between SU and the ACU

failed





ACU unit in IFU Basic Frame. If alarm


CONFIGURATION FAILURE Configuration of the ACU failed Check for "SUBUS LINK" or




ACU unit in IFU Basic Frame. If alarm


LIU Optical


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LIU Optical


LOST CONTACT Communication between SU and LIU failed Check for "SUBUS LINK" or




LIU in IFU Basic Frame. If alarm condition

persists - replace unit

CONFIGURATION FAILURE Configuration of LIU failed Check for "SUBUS LINK" or






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



Mismatch




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


LOST CONTACT Communication between SU and LIU failed Check for "SUBUS LINK" or





persists - replace unitCONFIGURATION FAILURE Configuration of LIU failed Check for "SUBUS LINK" or






LOS Loss of input signal to LIU Check cables and cable connectors to



LOF STM-1/STS-3/OC-3 Loss Of Frame Check cables and cable connectors to




Mismatch




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


LOST CONTACT Communication between SU and LIU 3xDS3/

E3 unit failed







CONFIGURATION FAILURE Configuration of LIU 3xDS3/E3 unit failed Check for "SUBUS LINK" or"CONFIGURATION FAILURE" alarms on the





LOS 01...03 Loss of 3xDS3/E3 input signal Check cables and cable connectors to




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LIU 25x E1


LOST CONTACT Communication between SU and LIU 25xE1

unit failed







CONFIGURATION FAILURE Configuration of LIU 25xE1 unit failed Check for "SUBUS LINK" or






LOS 01...25 Loss of E1 input signal Check cables and cable connectors to



Gi bit Eth t


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Gigabit Ethernet


LOST CONTACT Communication between SU and Gigabit

Ethernet unit failed





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




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


LOST CONTACT Communication between SU and DXC unit

failed

Remove and re-insert DXC unit in IFU Basic


unit

CONFIGURATION FAILURE Configuration of DXC unit failed Check for "SUBUS LINK" or




DXC in IFU Basic Frame. If alarm condition


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


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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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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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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