Maintenance-Object Repair Procedures
555-233-143
8-408 Issue 1 May 2002
FAIL
(cont’d)
4. If the replaced OLS(s) still do not operate properly, then a circuit pack or a
defective telephone connected to a circuit pack in the affected carrier could
be causing an electrical load that is preventing the OLS from operating
properly. Unseat every circuit pack in the carrier, and reissue the recycle
carrier command.
a. If the recycle passes, then the OLSs are healthy, and the problem is
with one of the circuit packs. Reinsert the circuit packs one at a time. If
the status LED shows red after reinserting a circuit pack, then replace
the defective circuit pack. If the status LED still shows red, then remove
the amphenol connector on the back of the slot containing this circuit
pack and reissue the recycle carrier command. If the status LED
shows green, then the problem is with one of the telephones or the
wiring to one of the telephones on this slot.
b. If either OLS still shows a red status LED, then check for bent pins and
cable placement in the affected carrier. There are failures that can
occur on the EPN’s Maintenance circuit pack that will not be detected
by their respective maintenance, but that will cause many, if not every,
environment test to fail. If many environment tests are failing, the
suspect circuit pack, depending on the system configuration, should be
replaced and the test rerun.
FAIL DC-POWERED SYSTEMS
There is a problem with one or both port carrier power supplies on the tested
carrier.
1. For each port carrier power supply that has every status LED OFF, check
the DC input to the port carrier power supply at the port carrier power
supply outlet. If there is no DC, then check the appropriate circuit breakers
for the affected port carrier power supply. If the circuit breaker has tripped,
reset the circuit breaker. If the circuit breaker trips again or if DC is absent
at the port carrier’s power supply outlet, then there is probably a power
wiring problem in the cabinet.
2. At this point, DC should be present at the port carrier power supply outlet.
Use the recycle carrier UUC command (where UUC is the appropriate
cabinet and carrier) in an attempt to bring back the port carrier power
supplies for this carrier. If the test passes, the trouble is cleared. If the test
does not pass, one port carrier power supply, or both, in the tested carrier
is defective. If only one port carrier power supply is defective, then the
status LEDs on the healthy port carrier power supply will light green for a
moment. When the recycle test determines that both port carrier power
supplies are defective, the software will turn off power to both the good and
defective port carrier power supplies. This will cause the status LED(s) on
the good port carrier power supply to light red.
Table 8-165. Test #127 OLS Query Test — Continued
Error
Code
Tes t
Result Description / Recommendation
Continued on next page
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