Conventions Used in This DocumentFault Isolation
950-734-100-01, Revision 01
38
December 18, 1998
PLL-734 List 1
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.