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MMI-BD
Issue 1 June 2005 1663
MMI Synchronization Status Test
(#1122 and 1123)
This test is nondestructive.
To support applications involving multiple MMI circuit packs, the appropriate MMI circuit packs
must be synchronized with one another. One such circuit pack is designated as the master sync
source, which provides the synchronization signal onto the TDM bus. The other MMI circuit
packs in the system listen to this signal.
This test monitors this synchronization state. The test fails if the MMI circuit pack is not in sync.
The test passes with auxiliary code 1100 if the MMI circuit pack is in sync and is providing the
synchronization signal for the system. The test also passes with an auxiliary code of 1101 if the
MMI circuit pack is in sync and listening to the sync signal. MMI circuit packs do not lose the
synchronization signal unless an MMI circuit pack is either pulled out of the system or reset by
using a technician command.
Test #1122 runs when the long option of test board is entered, initiating the recovery of
synchronization. Test #1123 runs when the short option of test board is entered, giving the
status of the synchronization. The long option is not required, because synchronization signal
recovery should take place within software running in the background. Use the long option only
if synchronization is not established within 5 minutes of investigating the problem.
2100 ABRT Could not allocate the necessary resources to run this test. This is an
abnormal abort.
1. Retry the command at 1-minute intervals up to 5 times.
FAIL The TSI was found to be transmitting in error, causing noisy and unreliable
connections.
1. Replace the circuit pack.
PASS The TSI is correctly using its allocated time slots.
Table 615: Test #1108 TSI Loop-Around Test (continued)
Error
Code
Test
Result
Description / Recommendation
2 of 2