Nortel Networks 553-3001-211 manual NTAG26 Xmfr card, MF signaling

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NTAG26 XMFR card

Contents

This section contains information on the following topics:

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 683

MF signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 683

Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 688

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.

Circuit Card Description and Installation