Nortel Circuit Card, Installation Manual, Page: 283 / 908

NT5D33 and NT5D34 Lineside E1 Interface cards Page 283 of 906
Circuit Card Description and Installation
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 will go out if either the motherboard or daughterboard is
enabled by the software. If the LED continually flashes or remains weakly lit,
replace the card.
Daughterboard 12 30
Daughterboard 13 31
Table 104
Card unit number to E1 channel mapping (Part 3 of 3)
Item TN E1 Channel Number