DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures

Page10-1407TDM-BUS (TDM Bus)

10
TDM Bus Clock Parameter Update Test (#151)

This action updates the Tone-Clock internal circuit pack parameters. Tone-Clock

circuit pack:

■Disable in-line duplication status messages.
■Disable in-line subrate frame maintenance messages (TN768, TN780

only).

■Set the PPM threshold at 60 PPM for TN768 and TN780. Set the PPM

threshold at 85 PPM for TN2182.

■Enable PPM threshold switching
ANY

(cont’d.)

FAIL 4. If there are no other errors besides Error Type 1537 against TDM-CLK
and if this error was logged against the Tone-Clock circuit pack that
provided the current system synchronization reference (use the status
synchronization command to determine this), replace the defective
Tone-Clock circuit pack.
!WARNING:

Since service may be disrupted when the following procedures are

carried out, try to perform the following st eps when it is con veni ent f or

the customer.

5. If the Tone-Clock circuit pack under test is in the Activ e mode bu t is not
providing the current system synchronization reference, swit ch the
synchronization reference to the Tone-Clock circuit pack under test
using the set synchronization PC command. Rerun the test. If the test
still fails, replace the defective Tone-Clock circuit pack.
6. If the Tone-Clock circuit pack under test is in the Standby mode place
it in the Active mode via the command set tone-clock PC. Switch the
synchronization reference to the Tone-Clock circuit pack under test
using the set synchronization PC command. Rerun the test. If the test
still fails, replace the defective Tone-Clock circuit pack.
PASS The Tone-Clock circuit pack does not detect timing any PPM errors. This
indicates that the external synchronization timi ng source is valid or that the
system synchronization reference is a Tone-Clock circuit pack. The status
synchronization command should be used to verify that the desired
synchronization reference is providing timing for the system.
Table 10-426. TEST #150 TDM Bus Clock PPM Inquiry Test — Continued
Error
Code Test
Result Description/ Recommendation
Continued on next page