MMI-BD
Issue 4 May 2002
10-1119555-233-123
System Technician-Demanded Tests:
Descriptions and Error Code
Always investigate tests in the order presented in the table below when inspecting
errors in the system. By clearing error codes associated with the TSI Crosstalk
Test (#6), for example, you may also clear errors generated from other tests in the
testing sequence.
TSI Crosstalk Test (#6)
This test is non-destructive.
The Time Slot Interchanger (TSI) chip controls connectivity to the TDM bus. The
TSI Cross Talk Test verifies that this TSI talks on the selected TDM bus time slot
and never crosses over to time slots reserved for other connections. If the TSI is
not working correctly, one-way and noisy connections may occur. If the test
passes, then the TSI is able to communicate over the TDM bus. This test is part of
the circuit pack’s demand and scheduled long test sequence, and takes
approximately 20 to 30 seconds to complete.
Table 10-420. System Technician-Demanded Tests: MMI-BD
Order of Investigation
Short Test
Sequence
Long Test
Sequence
Reset Board
Sequence D/ND
1
1 D = Destructive, ND = Non-destructive
TSI Crosstalk (#6) X ND
TSI Looparound Test (#1108) X ND
MMI SYNC Status Test (#1123) X ND
MMI SYNC Status Test (#1122) X ND
Control Channel Looparound Test (#52)
2
2 Refer to the repair procedure described in XXX-BD (Common Port Circuit Pack) for a description
of this test.
XX ND
SAKI Sanity Test (#53)
2
XD
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