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Option 11C and 11C Mini Technical Reference Guide
414
Chapter 23 — NTAG26 XMFR card
Contents
This section contains information on the following topics:
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
MF signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
Signaling levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 410
XMFR receiver specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413
Overview
The XMFR (Extended Multi-frequency receiver) card is used to receive MF
digit information. Connections are made between a PBX and a CO. The
XMFR card can only operate in systems using µ-law companding.
MF signaling
The MF feature allows the Option 11C system to receive digits for 911 or
feature group D applications.