Maintenance Object Repair Procedures
555-233-123
10-1800 Issue 4 May 2002
For a system with a TN768, TN780 or TN2182 Tone-Clock Circuit Pack:
Notes:
a. Refer to XXX-BD for descriptions of these tests.
b. Refer to TONE-PT for descriptions of these tests.
c. Refer to TDM-CLK for descriptions of these tests.
d. This test runs only on the standby Tone-Clock circuit pack in a Port
Network with duplicated Tone-Clocks (High or Critical Reliability systems).
The circuit pack must be a TN780 with firmware version 2 or above or a
TN2182.
Clock Health Inquiry Test (#46)
This inquiry reads special data stored in memory to determine if this Tone-Clock
circuit pack had a loss of any of three clock types:
■ SYSCLK
■ SYSFM
■ SYSDCLK
If this data indicates this Tone-Clock circuit pack had a loss of any of these clocks,
the inquiry reports FAIL. In addition, if TDM-CLK error 1 is at threshold, this test
will FAIL. TDM-CLK error 1 indicates a suspect clock is at the edge of its specified
frequency. If the circuit pack did not have a loss of clock or TDM-CLK error 1 at
threshold, the inquiry reports PASS.
Order of Investigation
Short Test
Sequence
Long Test
Sequence
D/
ND
1
1 D = Destructive; ND = Nondestructive
SAKI Reset Test (#53) (a) X
Clock Health Inquiry Test (#46) X X
Control Channel Loop Around Test (#52) (a) X X
Tone Generator Crosstalk Test (#90) (b) X
Tone Generator Transmission Test (#40) (b) X X
Tone Generator Audit/Update (#41) (b) X X
TDM Bus Clock Circuit Status Inquiry Test (#148)
(c)
XX
TDM Bus Clock Slip Inquiry (#149) (c) (e) X X
TDM Bus Clock PPM Inquiry Test (#150) (c) X X
TDM Bus Clock Parameter Update Test (#151) (c) X X
Board Type Check Test (#574) (c) X X
Standby Reference Health Check Test (#651) (c,d) X
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