ADC PG-Plus PRL-784, Technical Practice, Page: 25 / 30

SCP-PRL784-022-03H Fault Isolation
PG-Plus PRL-784 January 6, 2003 17
Phone does not
stop ringing • faulty subscriber station instrument
•
loop length too long
• faulty RT
1 If phone stops ringing when using a butt-in set at the subscriber location, the
subscriber's station internal resistance is too high. Replace phone.
2 If phone does not stop ringing when using a butt-in set at the subscriber location,
one or both of these conditions exist:
–
loop length is too long (refer to Specification table)
– or the RT is faulty.
Can not hear,
can not be heard • subscriber problem
•
faulty COLU or RT
1 Open the RJ-11 test jack at the RT. If audible level is acceptable, the problem is
with subscriber equipment.
2 If audible level is too low at the RT with the RJ-11 test jack lifted, lift the jumper
in the CO between the CO switch and the COTS.
– If audible level is acceptable, replace the COLU or RT
–
otherwise, the problem is in the CO switch.