STRAT-3 (Stratum 3 Clock)
Issue 4 May 2002
10-1561 555-233-123
Hardware Error Log Entries and Test to Clear
Val ues
Notes:
a. In the context of the Stratum 3 clock, an OFF-BOARD alarm occurs when
there is a DS1 facility problem; otherwise, the alarm is ON-BOARD
indicating that there is a fault in the Stratum 3 clock or in the connection
between the Stratum 3 clock and the PBX (Private Branch Exchange)
switch. If the Stratum 3 clock cannot be referenced, and therefore the local
oscillator on the TN780 Tone-Clock circuit pack must serve as the
reference instead, a Major alarm is raised. Otherwise, a Minor alarm is
raised.
b. This error can be caused by one of the following conditions:
1. One or both TOCs (Timing Output Cards) may have failed,
2. the connection between the Stratum 3 clock and the TN780
Tone-Clock circuit pack may be faulty, or
3. the TN780 Tone-Clock circuit pack may be defective.
Stratum 3 Clock Error Log Entries
Error
Type
Aux
Data Associated Test Alarm Level
On/Off
Board Test to Clear Value
0
1
1 Run the Short Test Sequence. Refer to the appropriate test description and follow the recommended
procedures.
0 Any Any Any test synchronization r 4
1 (d) Any Stratum 3 Clock
Alarm Query (#649)
MINOR OFF test synchronization r 4
257 (e) Any Stratum 3 Clock
Alarm Query (#649)
MINOR OFF test synchronization r 4
257 (c) None WARNING ON
513 (f) Any Stratum 3 Clock
Alarm Query (#649)
MINOR ON test synchronization r 4
769 (g) Any Stratum 3 Clock
Alarm Query (#649)
MINOR ON test synchronization r 4
1025 (h) Any Stratum 3 Clock
Alarm Query (#649)
MINOR/MAJOR(a) ON test synchronization r 4
1281 (i) Any Stratum 3 Clock
Alarm Query (#649)
MINOR/MAJOR(a) ON test synchronization r 4
1537 (b) none MINOR/MAJOR(a) ON
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