Avaya S8700 Maintenance Manual page 920

Maintenance-Object Repair Procedures
Table 8-83. Error type 1281 Aux Data and repair procedures — Continued
Aux Alarm
Data Description
16 Loss of Signal:
LOS
17 Loss of Frame:
LOF
18 Multiplexer
Section Alarm
Indication Signal:
MS_AIS
8-198 Issue 1 May 2002
Repair procedure
The fiber is not connected properly to the ATM-EI board or ATM
switch (or to the multiplexer section [MUX] if present).It is possible
that the board transceivers are not functioning properly.
Run test board UUCSS command.
If Test #1259 fails, connect a fiber back-to-back in a looped mode
(one strand of fiber connecting the transmit transceiver to the
receive transceiver of the board) and see if the amber LED flash
goes away. If it does the problem is off-board.
If the amber LED continues to flash, replace the circuit pack.
The fiber signal cannot obtain or maintain STM-1/OC-3 framing.
Try to move the fiber on the ATM switch side to a different port. This
could require administration on the ATM switch.
If the problem persists, reset the circuit pack (reset board UUCSS).
There is a major problem on the far end (between multiplexer
section [MUX] and the switch) that prohibits the circuit pack from
sending a valid signal.
See if the ports at the MUX and/or the ATM switch are connected
snugly.
Run test board UUCSS command
If Test #1259 fails with Error Code 18, connect a fiber back-to-back
in a looped mode (one strand of fiber connecting the transmit
transceiver to the receive transceiver of the board) and see if the
amber LED flash goes away.
If it does, the problem is off-board.
If the amber LED continues to flash, replace the circuit pack; if the
error persists, escalate the problem.
Continued on next page
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