CopperOptics 150-1303-02 Handbuch - Seite 7

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Indication
FAULT LED
on
No Dial tone,
Can't Dial
Phone
Doesn't
Ring
Phone
Doesn't
Stop
Ringing
Can't
Hear,
Can't Be
Heard
Copyright © 1996, PairGain Technologies, Inc. PairGain is a registered trademark, CopperOptics and PG-Flex are trademarks of
PairGain Technologies, Inc.
TABLE 3. FLC-703 RT CHANNEL UNIT TROUBLESHOOTING
Problem
The processor in
Remove and re-insert the Channel Unit. If the system does not
the Channel Unit
restart, replace the Channel Unit.
has stopped.
Troubleshooting based on customer-originated trouble reports
Short circuit, faulty
1. Lift the subscriber pair at the RT. If dial tone is present and
COT Channel Unit,
or faulty RT
2. If you cannot hear a dial tone and/or cannot make calls at the
Channel Unit.
High-resistance
1. Check for ringing at the RT. If ringing isn't present on the line
short on subscriber
drop, faulty RT
Channel Unit, or
faulty RT Line
Unit.
2. If ringing isn't present on a circuit terminated on the same RT
Faulty subscriber
1. Phone stops ringing when using a butt-in at subscriber location:
station instrument,
faulty RT Channel
Unit, or loop
length too long.
2. If phone doesn't stop ringing when using a butt-in at the
Subscriber
1. Lift the subscriber drop at the RT. If audible level is acceptable,
problem, faulty
COT Channel Unit,
2. If audible level is too low at the RT with the subscriber drop
or faulty RT
Channel Unit.
calls can be placed, check for shorts toward the subscriber.
RT with the subscriber drop lifted, lift the jumper in the CO
between the CO switch and the COT. If you hear a dial tone
and/or can make calls at the switch, try listening for dial tone
on another subscriber pair on a different RT Channel Card. If
dial tone is present on another pair, then replace the COT
Channel Unit and/or RT Channel Unit. If dial tone is not
present on the second subscribe pair, replace COT on RT Line
Unit. Otherwise, the problem is in the CO switch.
under test, try ringing another line terminated on the same RT
Channel Unit. If ringing is present on other lines, check for
high resistance shorts on the subscriber drop. If no high
resistance shorts, replace the RT Channel Unit.
Channel Unit, try ringing a line terminated on another RT
Channel Unit. If the line rings, replace the RT Channel Unit. If
the line doesn't ring, replace the RT Line Unit.
a) Subscriber's station instrument's internal resistance is too
high. Replace instrument according to local policies.
subscriber location, re-test at the RT:
a) If phone still doesn't stop ringing, replace the RT Channel
Unit.
b) Otherwise, loop length between RT and subscriber is too long.
there is a problem toward the subscriber.
lifted, lift the jumper in the CO between the CO switch and the
COT. If audible level is acceptable, replace the COT Channel
Unit and/or RT Channel Unit. Otherwise, the problem is in the
CO switch.
Action
Section 363-703-103
Revision 01
Page 7