Computer Hardware Installation Guide

Functional description 733

The functions provided by each unit on the E and M Trunk card include

2-wire signaling, 4-wire signaling, and paging operation as follows:

•

2-wire, E and M Type I signaling (see Figure 232 "E and M Type I

signaling" (page 736)) with:

— near-end seizure and outpulsing with M lead

— ground detection with E lead

— voice transmission through tip and ring for transmit and receive

•

4-wire, E and M Type I and II signaling (see Figure 233 "E and M Type II

signaling" (page 737)), 2-way dial repeating with:

— echo suppression for Type I signaling

— switchable 7 dB and 16 dB pads for carrier interface

— voice transmission and reception through two separate paths

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 01.04 Standard

Release 5.0 23 May 2008