Lucent Technologies Release 7 User Manual

Issue 4

June 1999

Maintenance Object Repair Procedures 

9-1543

STRAT-3 (Stratum 3 Clock) 

This error indicates that the Tone-Clock circuit pack in the master port 
network is not a TN780. If duplicate Tone-Clock circuit packs exist in the 
master port network, this error may mean that one or both Tone-Clock 
circuit packs are not TN780s. Verify that the Tone-Clock(s) in the master 
port network are TN780s.

Always investigate tests in the order presented in the following table when 
inspecting errors in the system. By clearing error codes associated with the 
Stratum 3 Clock Alarm Query Test, for example, you may also clear errors 
generated from other tests in the testing sequence.

The test synchronization commands also runs the Test Synchronization test 
(test #417). Test 417 is described in the SYNC section.

This test queries the Stratum 3 clock for its alarm status and reports the results of 
the query. The Stratum 3 clock provides the system with the following six alarm 
indications via the TN780 Tone-Clock circuit pack:

■

Reference A failed or CI card A failed.

■

Reference B failed or CI card B failed.

■

One power supply failed.

■

All power supplies failed.

■

One clock unit failed.

■

All clock unit(s) failed.

!

The removal of a card in the Stratum 3 clock may cause alarm(s) to be 
resolved and the query test to pass. However, the removed cards should 
still be replaced to restore the Stratum 3 clock to full service.

1.

D = Destructive, ND = Non-destructive

Stratum 3 Clock Alarm Query (#649)

X

X

ND