Avaya Definity SI, Руководство по обслуживанию, Страница: 2504 / 2968

Maintenance Object Repair Procedures
555-233-123 10-1718 Issue 4 May 2002
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.
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 status synchronization
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
steps when it is convenient for the customer.
5. If the Tone-Clock circuit pack under test is in the Active
mode but is not providing the current system
synchronization reference, 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.
6. If the Tone-Clock circuit pack under test is in the Standby
mode place it in the Active mode via set tone-clock PC.
Switch the synchronization reference to the Tone-Clock
circuit pack under test using set synchronization PC .
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 timing
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 10-631. TEST #150 TDM Bus Clock PPM Inquiry Test — Continued
Error
Code Test
Result Description/Recommendation
Continued on next page