ATM-EI (Expansion Interface Circuit Pack)
Issue 1 May 2002
8-225555-233-143
ATM Cross Talk Test (#1298)
This test is nondestructive. The ATM board Cross Talk test verifies that the
selected TDM bus time slot never crosses over to time slots reserved for other
connections. The test also checks for cross connections, where the board talks to
time slots other than those specified. Since this test uses many system resources
(TDM time slots, Tone Generator, Tone Detector, and others), it runs as a part of
demand test only.
This test fails if either the TDM programmable logic and/or the interface to the
DSP is not operating properly. Failure of these components can result in 1-way or
noisy connections. Refer to Figure 8-7 for a schematic of this test.
NOTE:
Note: This test takes approximately 12 minutes and applies only to TN2305
and TN2306 circuit packs.
Figure 8-7. ATM Cross Talk Test #1298 schematic
Table 8-94. ATM Crosstalk Test (#1298)
Error
Code
Tes t
Result Description / Recommendation
ABORT Could not allocate the necessary system resources to run this test.
1. Retry the command at 1-minute intervals up to 5 times.
1002 ABORT The system could not allocate time slots for the test. The system could be
under heavy traffic conditions or it could have time slots out-of-service due to
TDM-Bus errors. Refer to TDM-BUS to diagnose these errors.
1. If the system has no TDM-Bus errors and is not handling heavy traffic,
repeat test at 1-minute intervals up to 5 times.
Continued on next page
ATM
circuit
pack
PNC mode
iodfatcr AWF 040699
DSP Talker
TDM bus
(PN X)
Tone detector
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