DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1711TDM-BUS (TDM Bus)
9
Figure 9-107. Carrier Rewiring Example—Rear View of Five-Carrier Cabinet
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 4 is organized into two parts. Part 1 attempts to clear the TDM 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 TDM Bus from
the control carrier to additional carriers one at a time.
!
WARNING:
Power must be removed from the entire port network 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.
Part 1
1. If spare TDM/LAN Cable assemblies and TDM/LAN Bus Terminators are
not available, go to Part 2 of this procedure.
A and B
Include
Extended to
Shortened Bus
(Control Carrier)
to Carrier A Only
Bus Shortened
. . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. . . . . . . . . . .
TDM/LAN Bus Cable TDM/LAN Bus Terminator
Cabinet
Configured
Normally
Carrier E
Carrier D
Fans
Carrier A
Carrier B
Carrier C
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
