Ntag26 Xmfr Card; Contents - Nortel Circuit Card 311 Reference

NTAG26 XMFR card

Contents

This section contains information on the following topics:
"Introduction" (page 841)
"MF signaling" (page 841)
"Physical specifications" (page 844)
Introduction
The XMFR (Extended Multi-frequency receiver) card is used to receive MF
digit information. Connections are made between a PBX and a central office.
The XMFR card can only operate in systems using µ-law companding.
You can install this card in any IPE slot.
MF signaling
The MF feature allows the system to receive digits for 911 or feature group
D applications.
Signaling levels
MF signaling uses pairs of frequencies to represent digits.
Table 330 "MF frequency values" (page 841)
for received signals.
Table 330
MF frequency values
Copyright © 2003-2008, Nortel Networks
.
Digit
1
2
3
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
lists the frequency values used
Backward direction
DOD-Tx, DID-Rx
700 Hz + 900 Hz
700 HZ + 1100 Hz
900 Hz + 1100 Hz
841