Subscriber Reported Faults - ADC PG-PLUS PRL-779 Manual

Subscriber Reported Faults

S R
UBSCRIBER EPORTED
Use the craft interface to initiate a subscriber drop test to determine the cause of any of the following problems.
The subscriber drop test performs Hazardous Potential, Foreign Voltage, Resistive Faults, Receiver Off-Hook,
and Ringers Tests. Table 2
Conditions
no dial tone, • Short-circuit or
cannot dial open-circuit
• faulty COLU or RT
Phone does • high-resistance short on
not ring subscriber drop (REN load
exceeded, see
Specifications)
• faulty RT or COLU
Phone does • faulty subscriber station
not stop instrument
ringing
• loop length too long
• faulty RT
Cannot hear, • faulty COLU or RT
cannot be
heard
14
F
AULTS
provides procedures for isolating faults, based on subscriber reports.
Table 2. Subscriber Fault Isolating
Causes
1 At the CO using the craft interface, select Test menu option, and view the
test results. The tests run are for Hazardous Potential, Foreign Voltage,
Resistive Fault, and CPE Termination.
2 Check for shorts or opens towards the subscriber or on the customer premise.
3 Lift the jumper in the CO between the CO switch and the COT shelf. If dial
tone is present at the switch, replace the COLU.
4 If after replacing the COLU the dial tone is still not present, the fault is in the
RT. Replace the RT.
1 At the CO, using the craft interface, go to the COLU Main screen to verify
the correct operation of the COLU. If you cannot view the COLU Main
screen, a communication error exists indicating a faulty COLU. Remove and
re-insert the COLU.
2 Go to the Test menu option, and select the desired circuit to test.
3 View the subscriber drop test results. Refer to the Test Submenu section for
specific results.
4 Check for ringing on another line terminated on the same RT. If ringing is
present on other lines, check for high-resistance shorts on the subscriber
drop. If no high resistance shorts, replace the RT.
5 If ringing is not present on another circuit terminated on the RT, lift the
jumper between the CO switch and the COT shelf. If ringing is present,
replace the COLU. If ringing is not present, the fault is in the switch.
1 If phone stops ringing when using a butt 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 set at the subscriber
location, one or both of these conditions exist:
• loop length is too long (refer to Specifications)
• or the RT is faulty
Lift the jumper in the CO between the CO switch and the COT shelf.
• If audible level is acceptable, replace the COLU or RT
• otherwise, the problem is in the CO switch
January 6, 2003
SCP-PRL779-015-04H
Procedures
PRL-779 List 1E