Nortel Networks 311 User Manual
841
NTAG26 XMFR card
Contents
This section contains information on the following topics:
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.
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.
D applications.
Signaling levels
MF signaling uses pairs of frequencies to represent digits.
lists the frequency values used
for received signals.
Table 330
MF frequency values
MF frequency values
Digit
Backward direction
DOD-Tx, DID-Rx
1
700 Hz + 900 Hz
2
700 HZ + 1100 Hz
3
900 Hz + 1100 Hz
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.