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Maintenance Object Repair Procedures
555-233-123 10-254 Issue 4 May 2002
ATM Board DSP Test (#1293)
Nondestructive
There are three kinds of digital signal processors (DSPs): talkers, listeners, and
echo cancelers.Talkers put data on the TDM bus, listeners take data off the TDM
bus, and echo cancelers filter out echoes of the main transmission. Firmware
allocates DSPs in sets of three (one of each type), up to a maximum of 8 sets.
This has three parts, one for each type of DSP. If the test fails for all DSPs, a
MAJOR alarm is raised. If the test fails for one or more DSPs, a MINOR alarm is
raised. If a DSP is busy, the test passes for that DSP. The test aborts if system
resources are not available. Each part of the test returns the number of DSPs that
passed or failed. This test run during initialization, error analysis testing, periodic,
scheduled, and craft short and long testing.
Table 10-104. ATM Board DSP Test (#1293)
Error
Code Test
Result
Description/Recommendation
1002 ABORT Could not allocate time slots. Traffic could be heavy or time slots
could be out-of-service
Run display errors, and follow associated repair procedures for
TDM-BUS.
Retry the command up to 3 times at 1-minute intervals.
1003 ABORT Could not allocate a tone detector. Too few tone detectors
present or tone detectors out-of-service.
Run display errors, and follow the repair procedures associated
with any TTR-LEV (TTR Level) errors that appear.
Make sure that there is at least one tone detector on the network
that holds the ATM-TRK circuit pack.
Resolve any TONE-PT (Tone Generator) errors listed in the Error
Log.
Retry the command up to 3 times at 1-minute intervals.
1962 ABORT All DSPs are busy. This is a very unlikely event.
Retry the command up to 3 times at 1-minute intervals.
2000 ABORT Test timed out.
If the ATM-TRK circuit pack is in standby, reset the board and
run the test again after the ATM-TRK circuit pack is inserted.
Examine the Error Log for Error 1218 (bad DSP).
Run the test again.
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