Subscriber Reported Faults - ADC PG-PLUS PLL-724 Manual

SCP-PLL724-010-04H
LED Mode Condition
PWR Off no input power
on-board fuse is blown on
COLU
PWR Flashing HDSL line open
an overload exists
ISDN Off ISDN channel is not active
Activit
y
S R
UBSCRIBER EPORTED
At the CO, you can use the Craft interface to initiate a SDT to determine the cause of any of the following
problems. The SDT test performs Hazardous Potential, Foreign Voltage, Resistive Faults, Receiver Off-Hook, and
Ringers Tests. At the customer site, the following sections provide procedures for isolating faults, based on
subscriber reports.
Conditions Causes
no dialtone, can Short-circuit or open-circuit 1 At the CO using the Craft interface, select
not dial
faulty COLU or RT
Phone does not high-resistance short on
subscriber drop (REN load
ring
exceeded, see
Specifications)
faulty RT or COLU
PLL-724 List 1
Procedure
1 Ground fault condition exists.
2 Check input power at COTS backplane with COLU removed.
3 If power is present at COTS backplane, replace the COLU.
1 Check line continuity and resistance.
2 COLU power supply or RT may be faulty.
1 Make sure the customer ISDN terminal equipment is connected and
operational at RT.
2 Check that the HDSL link is normal. The HDSL SYNC LED should be
On solid green and the HDSL Margin LED should be Off.
3 Disconnect the customer side terminal equipment by opening the
protector module and disconnecting the ISDN RJ-11 jack. Configure the
ISDN Basic Rate Test set and verify the ISDN activity LED is On green
after approximately 30 seconds. Check for shorts or opens towards the
subscriber side or on the customer premises.
F
AULTS
Procedures
results. The tests run are for Hazardous Potential, Foreign Voltage,
Resistive Fault, and CPE Termination.
2 At the RT, lift the subscriber pair at the RT by opening the RJ-11 connector
on the Integrated Protector Module. If dialtone is present at the RT and
calls can be placed, the fault is in the subscriber side. Check for shorts or
opens towards the subscriber or on the customer premise.
3 If dialtone is not present with the RJ-11 test connector lifted, lift the
jumper in the CO between the CO switch and the COTS. If dialtone is
present at the switch, replace the COLU.
4 If after replacing the COLU the dialtone 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.
Test
2 Go to the option, and select the desired circuit to test.
3 View the SDT results. Refer to the Test Submenu section for specific
results.
4 At the RT, check for ringing at the RT with the RJ-11 test jack open. If
ringing is not present, 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 COTS. If ringing is present, replace
the COLU. If ringing is not present, the fault is in the switch.
January 6, 2003

Subscriber Reported Faults

TEST
option, and view the test
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