Nortel Circuit Card 311 Reference page 289

Disconnect supervision
The LEI supports far-end disconnect supervision by opening the tip side
toward the terminal equipment upon the system's detecting a disconnect
signal from the far-end on an established call. The Supervised Analog
Line feature (SAL) must be configured in LD 10 for each LEI port. At the
prompt FTR respond:
OSP <CR>
Against FTR respond:
ISP <CR>
The LEI treats OSP and ISP for both originating and terminating calls
as hook flash disconnect supervision, also known as cut-off disconnect.
Originating calls are outgoing from the terminal equipment. Terminating
calls are incoming to the terminal equipment. The LEI does not support
battery reversal answer and disconnect supervision on originating calls.
After the software is configured, power-up the card and verify the self-test
results. The STATUS LED on the faceplate indicates whether or not the
LEI has successfully passed its self test, and is, therefore, functional.
When the card is installed, this LED remains lit for two to five seconds as
the self-test runs. If the self-test completes successfully, the LED flashes
three times and remains lit. When the card is configured and enabled in
software, the LED goes out. The LED goes out if either the motherboard or
daughterboard is enabled by the software. If the LED continually flashes or
remains weakly lit, replace the card.
Copyright © 2003-2008, Nortel Networks
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Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
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