User Guide
DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si 
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures 
Page 10-1411TDM-CLK (TDM Bus Clock) 
10
See ‘‘SYNC (Synchronization)’’ for more details of the escalation plan. 
There 
exists a strong interdependency among the DS1 Interface circuit pack 
Maintenance, Synchronization Maintenance, and TDM Bus Clock Maintenance 
MOs
.
See the section on “TONE-BD” for a discussion of the relationship of Tone-Clock 
circuit packs with the various Reliability Options.
Error Log Entries and Test to Clear Values
Tone-Clock 
Role
Synchronization 
Facilities
Initial External 
Synchronization 
Source
Backup External 
Synchronization 
Source
Internal 
Source
MASTER
Stratum 3 Clock Source "A" Source "B"
Local 
oscillator
DS1 Primary and 
Secondary
DS1 Primary DS1 Secondary
DS1 Primary Only DS1 Primary None
No External Source None None
SLAVE
PNC Duplication Active EI Standby EI
No PNC 
Duplication
Active EI None
Table 10-430. TDM Bus Clock Error Log Entries 
Error 
Type
Aux 
Data Associated Test
Alarm 
Level
On/Off 
Board
1
Test to Clear Value
0
2
0 Any Any Any test tone-clock UUC sh r 1
1(a) 0 None MINOR OFF
18(b) 0 busyout tone-clock 
UUC
WARNING OFF release tone-clock UUC
130(c) None
257(d) None WARNING OFF
513(e) Any Clock Circuit Status 
Inquiry (#148)
MINOR
3
OFF test tone-clock UUC 
769(f) Any Clock Circuit Status 
Inquiry (#148)
MAJOR‡ ON test tone-clock UUC sh r 10
1025(g) Any Clock Slip 
Inquiry(#149)
test tone-clock UUC sh
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