Mfe Signaling - Nortel Circuit Card Installation Manual

Page 372 of 906
Table 141
MFC Frequency values (Part 2 of 2)
Digit
14
15

MFE signaling

Table 142
MFE Frequency values (Part 1 of 2)
Digit
1
2
3
4
553-3001-211 Standard 3.00
NT5K21 XMFC/MFE card
Forward direction
DOD-Tx, DID-Rx
1740 Hz + 1980 Hz
1860 Hz + 1980 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.
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 142 lists the forward and backward frequencies for MFE. The one
backward signal for MFE is referred to as the "control" frequency.
Forward direction
OG-Tx, IC-Rx
700 Hz + 900 Hz
700 Hz + 1100 Hz
900 Hz + 1100 Hz
700 Hz + 1300 Hz
August 2005
backward direction
DOD-Rx, DID-Tx
780 Hz + 540 Hz
660 Hz + 540 Hz
Backward direction
1900 Hz
(Control Frequency)
—
—
—