Nortel Networks Circuit Card 311 - Manual (Page 367)

MFE signaling 367
Digit
Forward direction
DOD-Tx, DID-Rx
backward direction
DOD-Rx, DID-Tx
4 1380 Hz + 1740 Hz 1140 Hz + 780 Hz
5 1500 Hz + 1740 Hz 1020 Hz + 780 Hz
6 1620 Hz + 1740 Hz 900 Hz + 780 Hz
7 1380 Hz + 1860 Hz 1140 Hz + 660 Hz
8 1500 Hz + 1860 Hz 1020 Hz + 660 Hz
9 1620 Hz + 1860 Hz 900 Hz + 660 Hz
10 1740 Hz + 1860 Hz 780 Hz + 660 Hz
11 1380 Hz + 1980 Hz 1140 Hz + 540 Hz
12 1500 Hz + 1980 Hz 1020 Hz + 540 Hz
13 1620 Hz + 1980 Hz 900 Hz + 540 Hz
14 1740 Hz + 1980 Hz 780 Hz + 540 Hz
15 1860 Hz + 1980 Hz 660 Hz + 540 Hz
The exact meaning of each MFC signal number (1-15) within each level
can be programmed separately for each trunk route using MFC. This
programming can be done by the customer and allows users to suit the
needs of each MFC-equipped trunk route.
Each MFC-equipped trunk route is associated with a data block that
contains the MFC signal functions supported for that route.
MFE signaling
The NT5K21 XMFC/MFE card can be programmed for MFE signaling which
is used mainly in France. MFE is much the same as MFC except it has its
own set of forward and backward signals.
Table 164 "MFE Frequency values" (page 367) lists the forward and
backward frequencies for MFE. The one backward signal for MFE is referred
to as the "control" frequency.
Table 164
MFE Frequency values
Digit
Forward direction
OG-Tx, IC-Rx Backward direction
1 700 Hz + 900 Hz 1900 Hz
(Control Frequency)
2 700 Hz + 1100 Hz —
3 900 Hz + 1100 Hz —
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright © 2003-2008, Nortel Networks
.