DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-186ATM-EI (Expansion Interface Circuit Pack)
9
Expansion Interface 2-way Transmission Test
(#241)
This test is non-destructive and applies to all ATM-EIs, both active and standby. It
is run as part of craft short and long testing, periodic, scheduled, initialization,
and error analysis testing. The test sets up a connection between a Tone/Clock in
one cabinet and a Tone Detector in a separate cabinet and transmits a digital test
count between the port networks. The ATM-EIs used to set up this connection are
chosen by maintenance, not call processing. After the connection is checked for
dial-tone, the connection is torn down and re-established in the opposite
direction.
In this test the second ATM-EI may be in any port network outside the port
network of the ATM-EI under test. Therefore if the test should fail in any direction,
the test is repeated with a different port network, if available, which aids the fault
isolation procedure.
The test results indicate if the test failed in one or both directions. The test aborts
if the ATM-EIs do not exist on both ends (for example, the EIs are not
administered correctly). If the test passes, the TDM and ATM framer interfaces of
both ATM-EIs are functioning properly. If the test fails, a series of tests are run on
the board. Figure 9-4
shows a schematic of this test.
1 FAIL One (or more) DSP on the circuit pack is defective. Because of the above
condition maintenance software could not allocate a DSP for this test:
1. Test the circuit pack (test board UUCSS) and see if the DSP Test
#1258 passes.
2. If the DSP Test #1258 fails, replace the circuit pack.
3. If the DSP Test #1258 passes, retry the command at 1-minute
intervals a maximum of 3 times.
6 FAIL Cannot establish a looparound because the previously-established
looparound was not removed.
1. Retry the command at 1-minute intervals a maximum of 3 times.
2. If the test fails with the same error code, replace the circuit pack.
FAIL The board is writing on unauthorized TDM time slots.
1. Retry the command at 1-minute intervals a maximum of 3 times.
2. If the failure persists, replace the circuit pack.
PASS The board is not talking to unauthorized time slots on the TDM Bus.
Table 9-79. NPE Crosstalk Test (#6) — Continued
Error
Code
Te st
Result Description/ Recommendation
Continued on next page
