Owner's manual

Functional description 645

Figure 211

E and M Trunk card - block diagram

• Isolation of foreign potentials from transmission and signaling circuit.

• Software control of A/µ-Law mode.

• Software control of digit collection.

The following features are common to all circuits on the NT8D15 E and M

Trunk Card:

• Analog-to-digital and digital-to-analog conversion of transmission

signals

• Interfaces each of the four PCM signals to one DS30X timeslot in A10

format

• Transmit and receive SSD signaling messages over a DS30X signaling

channel in A10 format

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 02.06 Standard

27 August 2008