Avaya 03-300430 User Manual

l. Error Type 1281: The loss of high-level signal indicating operational problems of equipment 

located outside of the circuit pack and the fiber connected to the board.  Aux Data values 
are listed in 

15

SYSCLOCK 

failed

The board is not locked to the TDM backplane clock signal.  This is 

probably due to a Tone-Clock problem.

1. Check for TDM-BUS or TONE-BD errors in the Error Log.
2. If no other problems are present, reset the circuit pack (reset 

board location)

16

Loss of Signal: 

LOS

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.

1. Run test board location.

2. 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.

3. If the amber LED continues to flash, replace the circuit pack.

17

Loss of Frame: 

LOF

The fiber signal cannot obtain or maintain STM-1/OC-3 framing.

1. Try to move the fiber on the ATM switch side to a different port.  

This could require administration on the ATM switch.

2. If the problem persists, reset the circuit pack (reset board 

location).

18

Multiplexer 

Section Alarm 

Indication 

Signal: 

MS_AIS

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.

1. See if the ports at the MUX and/or the ATM switch are 

connected snugly.

2. Run test board location.

3. 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.

4. If it does, the problem is off-board.
5. If the amber LED continues to flash, replace the circuit pack; if 

the error persists, escalate the problem.

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