Server Alarms - Avaya Support

Communication Manager Maintenance Object Repair Procedures
In this procedure, the TDM/LAN cable assemblies and TDM/LAN bus terminators are replaced.
If replacement does not resolve the TDM-bus fault, the cabinet is reconfigured so that certain
carriers are disconnected from the TDM bus. This is done by moving the TDM/LAN bus
terminators (ZAHF4) on the carrier’s backplane. To terminate a TDM bus at the end of a
particular carrier, the TDM bus cable that connects the carrier to the next carrier should be
unplugged and replaced with a TDM/LAN bus terminator (see Figure 122). As the length of a
TDM bus is modified, any essential circuit packs to the system’s operation and TDM-bus
maintenance (for example, Tone-Clock), must still be connected to the shortened TDM bus.
Figure 122: Carrier Rewiring Example — Rear View of 5-Carrier Cabinet
After cabling changes are made and verified, power must be restored to the PN. Circuit packs in
carriers outside the shortened bus are not inserted. As a result, these circuit packs are alarmed.
Ignore these alarms for now. Every alarm should be resolved when the cabinet is restored to its
original configuration.
Procedure 4 is organized into two parts. Part 1 attempts to clear a TDM-bus fault by replacing
every bus cable and terminator within a PN. Part 2 attempts to isolate the fault to a particular
carrier by extending the TDM bus from the control carrier to additional carriers one at a time.
WARNING: Power
Carrier C
Carrier B
Carrier A
Fans
Carrier D
Carrier E
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
Normally
Configured
Cabinet
(All 5 Carriers
TDM/LAN Bus Terminator
. . . . . . . . . . .
Bus Shortened
to Carrier A Only
(Control Carrier)
TDM/LAN Bus Cable
. . . . . . . . . . . . . .
. . . . . . . . . . . . . .
Shortened Bus
Extended to
Include
A and B
! WARNING:
must be removed from the entire PN before any cables or terminators are
removed. Failure to follow this procedure can cause damage to circuit packs and
power supplies, and can be hazardous to the technician.
1318 Maintenance Alarms for Avaya Communication Manager, Media Gateways and Servers