Avaya 03-300430 User Manual

h. Error Type 771: the ATM switch is sending cells with unknown Virtual Path-Identifier (VPI) 

and Virtual Channel-Identifier (VCI) addresses.

1. Make sure that the ATM-TRK circuit-pack address is administered identically on the ATM 

switch and the S8700 Multi-Connect system.

i. Error Type 1281: Board major signals error (loss of high-level signal).  The far end has 

detected a major problem in transmissions originating from the ATM-TRK circuit pack.  The 
possible Aux Data values for this software counter 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 with 

16

Loss of Signal: 

LOS

The fiber is not connected properly to the ATM-TRK 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 with Error Code 16, 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 more the fiber on the ATM switch side to a different port.
2. If the problem persists, reset the circuit pack with reset 

board location.

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