Page 357 of 894
Circuit Card Description and Installation
366
NT5K21 XMFC/MFE card
Contents
This section contains information on the following topics:
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
MFC signaling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
MFE signaling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 360
Sender and receiver mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 361
Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364
Introduction
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 Central Office 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.
You can install this card in any IPE slot.
MFC signaling
The MFC feature allows the system to use the CCITT MFC R2 or L1
signaling protocols.