Nortel Networks Circuit Card - Manual (Page 372)

Page 372 of 906 NT5K21 XMFC/MFE card
553-3001-211 Standard 3.00 August 2005
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 142 lists the forward and backward frequencies for MFE. The one
backward signal for MFE is referred to as the “control” frequency.
14 1740 Hz + 1980 Hz 780 Hz + 540 Hz
15 1860 Hz + 1980 Hz 660 Hz + 540 Hz
Table 142
MFE Frequency values (Part 1 of 2)
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 —
4 700 Hz + 1300 Hz —
Table 141
MFC Frequency values (Part 2 of 2)
Digit
Forward direction
DOD-Tx, DID-Rx
backward direction
DOD-Rx, DID-Tx