Nortel Networks Circuit Card User Manual

 NT8D09 Analog Message Waiting Line card

This section outlines the procedures for configuring the switches and jumpers 
on the NT8D09 Analog Message Waiting Line card and configuring the 
system software to properly recognize the card. Figure 112 on 

shows where the switches and jumper blocks are located on this board.

The NT8D09 Analog Message Waiting Line card has no user-configurable 
jumpers or switches. The card derives its address from its position in the 
backplane and reports that information back to the CPU through the LAN 
Link interface.

Individual line interface units on the NT8D09 Analog Message Waiting Line 
card are configured using the Analog (500/2500-type) Telephone 
Administration program LD 10. 

The message waiting feature is enabled by entering data into the customer 
data block using LD 15. See Software Input/Output: Administration 
(553-3001-311) for LD 10 and LD 15 service change instructions.

Analog message waiting line cards with a vintage later than NT8D09AK 
provide a fixed +2 dB transmission profile change in the gain of the D/A 
convertor. See Table 183 on 

This transmission profile change is used for control of end-to-end connection 
loss. Control of such loss is a major element in controlling transmission 
parameters such as received volume, echo, noise, and crosstalk. The loss plan 
for the analog message waiting line card determines port-to-port loss between 
an analog line card unit (port) and other IPE ports. LD 97 is used to configure