Nortel Networks 1000 - Manual (Page 361)

MFE signaling 361
Table 149
MFC Frequency values
Digit
Forward direction
DOD-Tx, DID-Rx
backward direction
DOD-Rx, DID-Tx
1 1380 Hz + 1500 Hz 1140 Hz + 1020 Hz
2 1380 Hz + 1620 Hz 1140 Hz + 900 Hz
3 1500 Hz + 1620 Hz 1020 Hz + 900 Hz
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 150 "MFE Frequency values" (page 362) lists the forward and
backward frequencies for MFE. The one backward signal for MFE is
referred to as the "control" frequency.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.