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PRL-771 Overview
C
H
LOSE THE
OUSING
Failure to close the Telco Access door or the RT housing cover leaves the RLU interior exposed to the
environment. This shortens the life span of the RLU.
To close the housing:
1
Close the Line Module door.
2
Close the Telco Access door.
3
Tighten the screw on the Telco Access door until it is completely seated. This is to avoid interference with
the RT enclosure cover.
4
Close the RT housing cover and secure both the Telco override screw and the slotted-head Customer Access
screw.
F
I
AULT
SOLATION
The circuit board metal enclosure has a System Status window through which Status LEDs can be viewed. The Status
LEDs indicate different system states such as status of power, and subscriber line activity including on-hook,
off-hook, ringing, and subscriber drop test activity. The top portion of the Reference label provides a guide to what
the Status LEDs indicate (see Figure 12).
PG-Plus
If the RLU fails to indicate power on (as evidenced by the PWR LED being off), perform the following diagnostic
and repair operations:
1
Verify that the RLU and its corresponding COLU are installed on the same pair.
2
Verify that the corresponding COLU is installed and turned up, and that the HDSL Periodical Power Up
option is enabled.
3
Verify that the signal loss on the pair is no more than 41 dB at 196 kHz.
4
Replace the RLU.
5
Replace the corresponding COLU.
6
Check for a short placed on the HDSL Tip and Ring conductors, and remove if necessary.
7
Check for HDSL cable fault, and replace if necessary.
14
ON:
POWER NORMAL/HDSL SYNC
FLASH:
POWER NORMAL/NO SYNC
OFF:
NO POWER
ON:
RT FAULT
FLASH:
SUBSCRIBER DROP TEST
OFF:
NORMAL
ON:
CHANNEL(S) ACTIVE
FLASH:
RINGING
OFF:
ALL CHANNELS IDLE
Figure 12. Status Window
January 6, 2003
SCP-PRL771-012-05H
POWER
STATUS
ACTIVITY
PG-Plus PRL-771
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