Chapter 24: Ntag26 Xmfr Card; Contents; Introduction; Mf Signaling - Avaya Nortel Communication Server 1000 Reference

Chapter 24: NTAG26 XMFR card

Contents

This section contains information on the following topics:

Introduction

MF signaling

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 206: MF frequency values
signals.
Table 206: MF frequency values
Circuit Card Reference
on page 481
on page 481
on page 481 lists the frequency values used for received
Digit
1
Backward direction DOD-Tx, DID-Rx
700 Hz + 900 Hz
July 2011 481