TDM-BUS (TDM Bus)
Issue 4 May 2002
10-1719 555-233-123
■ Enable PPM threshold switching
■ Set the number of slips to trigger loss of signal - currently 30 per 5
millisecond period
■ Enable the on-board synchronization switching algorithm (see above)
■ Enable holdover operation (TN2182 only).
This is not a test and will always pass without identifying or reporting any
Tone-Clock circuit pack errors.
TDM-Clock Circuit Pack Type Test (#574)
The purpose of this query is to check if the required type of Tone-Clock circuit
pack (TN780) is present when the Stratum 3 clock is administered.
Table 10-632. TEST #151 TDM Bus Clock Parameter Update Test
Error
Code
Te s t
Result Description/Recommendation
ABORT Internal system error
FAIL Internal system error
1. Retry the command at 1-minute intervals a maximum of 5
times.
PASS The Tone-Clock circuit pack parameters have been
successfully updated.
Continued on next page
Table 10-633. TEST #574 TDM Clock Circuit Pack Type Test
Error
Code
Te s t
Result Description/Recommendation
ABORT The system could not allocate the necessary resources for the
test.
1. Wait 1 minute and retry the test.
FAIL The Tone-Clock circuit pack in the system is not a TN780. The
Stratum 3 clock requires a TN780 Tone-Clock circuit pack.
1. Replace the Tone-Clock circuit pack with a TN780. The
old circuit pack may still be good, and need not be
discarded.
PASS The required TN780 circuit pack is present.
Continued on next page
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