Nortel Networks 1000 - Manual (Page 645)

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
Copyright © 2003-2008 Nortel Networks
.