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 c hanges are made and verified, p ower must be restored to the port
network. Circuit packs in c arriers that are not part of the shortened bus are not
inserted. As a result, these circ uit packs are alarmed. Ig nore these alarms for
now. All alarms should be resolved when the c abinet is restored to its orig inal
configuration.
Procedure 4 is organized into two p arts. Part 1 attempts to clear the TDM Bus
fault by repl a cing all the bus cabling and termi nators w ithin a port-n etwork . Part 2
attempts to isolate the fault to a par ticular carrier by extend ing the TDM Bus from
the control carrier to add itional carriers one at a time.
!WARNING:

Power must be removed from the entire port network b efore any cables or

terminators are removed. Failure to follow this proced ure can cause

damage to circ uit packs and p ower supplies, and c an 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 proc edure.
A and B
Include
Extended to
Shortened Bus
(Control Carrier)
to Carrier A Only
Bus Shortened
. . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. . . . . . . . . . .
TDM/LAN Bus Cable TDM/LAN Bus Terminator
(All5 Carriers
Cabinet
Configured
Normally
Carrier E
Carrier D
Fans
Carrier A
Carrier B
Carrier C
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. . . . . . . . . . . . . . . .
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