Demand test descriptions and error codes - Avaya Support

SER-BUS (Serial Communication Bus)
certain carriers are disconnected from the Serial Bus. This is done by moving the TDM/LAN Bus
terminators (AHF110) on the carrier backplane. To terminate a Serial Bus at the end of a
particular carrier, the Serial Bus cable that connects the carrier to the next carrier should be
unplugged and replaced with the TDM/LAN Bus terminator. When the length of the Serial Bus is
modified the A carrier TN2312BP IPSI circuit pack that is essential to the Serial Bus operation
and Serial Bus maintenance must still be connected to the new shortened Serial Bus.
After cabling changes are made and verified, power must be restored to the port network.
Circuit packs in carriers that are not part of the shortened bus are not inserted. As a result,
these circuit packs are alarmed. Ignore these alarms for now. All alarms should be resolved
when the cabinet is restored to its original configuration.
Procedure 2 is organized into two parts:
● Part 1 attempts to clear the Serial Bus fault by replacing all the bus cabling and terminators
within a port-network.
● Part 2 attempts to isolate the fault to a particular carrier by extending the Serial Bus from
the A carrier to additional carriers one at a time.
Refer to the repair procedure steps given for the Serial Bus Status Test (#1531)
Error log entries and recommended actions
Error
Type
Aux
Data
Associated Test Alarm
Level
Notes:
a. Error type 257: serial bus failure. There are no power supplies detected on the serial bus.
Demand test descriptions and error codes
On/Off
Board
Recommended Action
257 (a) Serial Bus Status Test (#1531) MIN Off test environment location
Order of investigation Short test
sequence
Long test
sequence
Serial Bus Status Test (#1531) X X ND
1. D = Destructive, ND = Nondestructive
D/ND 1
Issue 5 May 2009 827