Physical Specifications; Introduction - Nortel Circuit Card 311 Reference

844 NTAG26 XMFR card
Physical specifications
The physical specifications required by the NTAG26 XMFR circuit card are
shown in

Introduction

Table 332
Physical specifications
Dimensions
Faceplate LED
Power requirements
Environmental considerations
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.
Signaling levels
MF signaling uses pairs of frequencies to represent digits.
The following table lists the frequency values used for received signals.
Table 333
MF frequency values
Copyright © 2003-2008, Nortel Networks
.
Table 332 "Physical specifications" (page
Height:12.5 in. (320 mm)
Depth:10.0 in. (255 mm)
Thickness:7/8 in. (22.25 mm)
Lit when the circuit card is disabled
1.1 Amps typical
Meets the environment of CS 1000E, CS 1000M, and
Meridian 1 systems
Digit
1
2
3
4
5
6
7
8
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
844).
Backward direction
DOD-Tx, DID-Rx
700 Hz + 900 Hz
700 HZ + 1100 Hz
900 Hz + 1100 Hz
700 Hz + 1300 Hz
900 Hz + 1300 Hz
1100 Hz + 1300 Hz
700 Hz + 1500 Hz
900 Hz +1500 Hz