Functional description 733
The functions provided by each unit on the E and M Trunkcard include
2-wire signaling, 4-wire signaling, and paging operation as follows:
•2-wire, E and M TypeI signaling (see Figure 232 "E and M TypeI
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 TypeI 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 23May 2008
Copyright© 2003-2008, Nor tel Networks
.