Overview; Mfc Signaling; Chapter 22 — Nt5K21 Xmfc/Mfe Card - Meridian Nortel 1 Option 11C Technical Reference Manual

Chapter 22 - NT5K21 XMFC/MFE card
Contents

Overview

MFC signaling

This section contains information on the following topics:
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399
MFC signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399
Signaling levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400
Forward and backward signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400
MFE signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 402
Sender and receiver mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403
XMFC sender and receiver specifications . . . . . . . . . . . . . . . . . . . . . . . 404
XMFE sender and receiver specifications . . . . . . . . . . . . . . . . . . . . . . . 406
Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407
The XMFC/MFE (Extended Multi-frequency Compelled/Multi-frequency
sender-receiver) card is used to set up calls between two trunks. Connections
may be between a PBX and a CO or between two PBXs. When connection
has been established, the XMFC/MFE card sends and receives pairs of
frequencies and then drops out of the call.
The XMFC/MFE card can operate in systems using either A-law or µ-law
companding by changing the setting in software.
The MFC feature allows the Option 11C system to use the CCITT MFC R2
or L1 signaling protocols.
Option 11C and 11C Mini
Page 399 of 544
Technical Reference Guide