Nortel Networks 1000 - Manual (Page 742)

742 NTAG26 XMFR card
•
TR-NPL-000258, Compatibility Information for F.G.D. switched access
service, Bell Communication Research Technical Reference, Issue 1.0,
October 1985.
•
TR-NPL-000275, Notes on the BOC Intra-LATA Networks, Bell
Communication Research Technical Reference, Chapter 6, 1986.
Physical specifications
The physical specifications required by the NTAG26 XMFR circuit card are
shown in
Table 297 "Physical specifications" (page 742) .
Introduction
Table 297
Physical specifications
Dimensions Height:12.5 in. (320 mm)
Depth:10.0 in. (255 mm)
Thickness:7/8 in. (22.25 mm)
Faceplate LED Lit when the circuit card is disabled
Power requirements 1.1 Amps typical
Environmental considerations Meets the environment of CS 1000E, CS 1000M, and
Meridian 1systems
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 298
MF frequency values
Digit
Backward direction
DOD-Tx, DID-Rx
1 700 Hz + 900 Hz
2 700 HZ + 1100 Hz
3 900 Hz + 1100 Hz
4 700 Hz + 1300 Hz
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.