Nortel Networks 1000 User Manual

Page 475

Configuration

475

The message waiting feature is enabled by entering data into the
customer data block using LD 15. See Software Input/Output Reference
— Administration (NN43001-611) 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 200 "Transmission Profile Changes" (page 476)

Figure 121
Analog message waiting line card - typical cross connection example

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

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

02.06

Standard

27 August 2008