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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1390TDM-BUS (TDM Bus)
10
identification of the cause of a TDM Bus fault is difficult. If a TDM Bus problem is
suspected, the system technician should run the test tdm P system technician
command. If any of the resulting tests fail, then the system technician must
manually perform a TDM Bus isolation procedure to identify the cause of the
problem.
!
WARNING:
Since the TDM Bus fault isolation procedure involves removing circuit
packs and possibly disconnecting entire carriers, the procedure is
extremely destructive to the port network that contains the TDM Bus being
tested. If possible, this procedure should be used after hours or during
hours with minimum system use.
As circuit packs are removed or entire carriers are disconnected, any active calls
terminating on those circuit packs or carriers are dropped. If the system
technician has any hints about a particular circuit pack that may be causing the
TDM Bus problem (for example, a new circuit pack was inserted into the Port
Network just before the TDM Bus problem appeared), then those hints should be
investigated before performing this procedure.
For this procedure, make sure at least one Tone Detector circuit pack is in the
same Port Network in which the TDM Bus fault is being isolated. The Tone
Detector circuit pack is needed by maintenance to test the TDM Bus.
Procedure 1
This procedure is an attempt to isolate the TDM Bus fault to circuit packs that are
essential to the system operation. For each of the following circuit packs, perform
Procedure 1.
1. Display the Hardware Error and Alarm Logs for the circuit pack via the
display errors and display alarms commands.
2. If there are errors for the circuit pack, refer to its Maintenance
documentation and try to resolve the errors.
Circuit Pack Error Log Names
Tone-Clock TONE-BD, TONE-PT, and TDM-CLK
Network Control SW-CTL
Tone Detector DETR-BD, GPTD-PT, and DTMR-PT
Processor Interface PI-BD and PI-PT
Duplication Interface—only for systems
with High or Critical Reliability
DUPINT
Expansion Interface EXP-INTF