ECI XDM-300, Installation And Maintenance Manual

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Maintenance XDM-300 Installation and
Maintenance Manual
4-18 ECI Telecom Ltd. Proprietary 417006-2311-0H3-A00
Troubleshooting Transmission and Traffic
Alarms
Before any other troubleshooting activity, check the management station log to
check if a specific component has been reported as faulty and replace it.
C
AUTION
:
Before checking fiber break problems using an
OTDR (Optical Time-Domain Reflectometer), it is the user's
responsibility to disconnect the receiver port. Failure to do so
may damage the receiver irreparably.
Table 4-10: Troubleshooting transmission and traffic alarms
No. Symptoms Probable cause Corrective actions
1 Alarm related to
a client signal External problem 1. Check the proper operation of the equipment
providing the tributary signal and its connections to
the XDM-300 I/O port.
2. Use the results of the commissioning tests as a
reference for the required signal levels, and make
measurements of current levels at all the relevant
monitoring points.
Compare the reference levels with the measured
values; a significant discrepancy may point to the
failed component (for example, low transmit level,
excessive fiber attenuation due to physical damage,
and so on).
2 Alarm related to
a line signal External problem 1. Check the proper operation of the equipment
providing the line signal and its connections to the
XDM-300 port.
2. Use the network and site documentation to identify
the path associated with the reported alarm and all
related optical and/or electrical components. Use the
results of the commissioning tests as a reference for
the required signal levels, and make measurements of
current levels at all the relevant monitoring points
through the management.
3. Compare the reference levels with the measured
values; a significant discrepancy may point to the
failed component (for example, low transmit level,
excessive fiber attenuation due to physical damage,
and so on).