Nortel Networks 553-3001-211 manual Disconnect supervision

Page 212 of 894 NT5D11 and NT5D14 Lineside T1 Interface cards

Table 82

DX-30 to T1 time slot mapping (Part 2 of 2)

Item	TN	T1 Channel Number
Daughterboard	4	21
Daughterboard	5	22
Daughterboard	6	23
Daughterboard	7	24

Disconnect supervision

The lineside T1 card 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 lineside T1 port. At the prompt FTR, respond:

OSP <CR>

and against FTR respond:

ISP <CR>

The lineside T1 card 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 lineside T1 card 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 lineside T1 card has passed its self test, and is 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 flashes continuously or remains weakly lit, replace the card.

553-3001-211 Standard 2.00 September 2004