SYNC (Port-Network Synchronization)
Issue 1 May 2002
8-1523555-233-143
Figure 8-94. Facility Fault Sectionalization
Enter busyout board
for the DS1 Interface.
This circuit pack should
not be the on-line
synchronization reference.
Since this technique is time-consuming, first fix any DS1-BD,
UDS1-BD, STRAT-3 or SYNC errors that are not slip errors.
START (DS1 Interface refers to the TN722, TN767 or TN464 circuit pack.)
Loop transmit to receive on the
G3r side of the equipment
connected to the DS1 Interface.
(See Note 1).
NO
Restore service:
enter release
board for the
DS1 Interface.
YES
The fault lies beyond the
loop-around point. Remove
the loop-around and rewire
the connections. Is the
unit just tested the last unit
on the G3r side of the
maintenance boundary?
FAIL
The fault lies before the
loop-around point. Repair
or replace the defective
wiring or circuit pack.
If the problem cannot be
identified, escalate the
problem.
Move the loop-around point
to the next unit toward the
span line side. Loop transmit
to receive on the G3r side of
the next piece of equipment.
Report to the
appropriate
personnel that
the problem is
beyond the
maintenance
boundary.
PASS
Execute the Slip Alarm
Inquiry Test (#144) via
test board command.
(See Note 2).
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