Nortel Networks Circuit Card User Manual

 NT5K21 XMFC/MFE card

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.

14

1740 Hz + 1980 Hz

780 Hz + 540 Hz

15

1860 Hz + 1980 Hz

660 Hz + 540 Hz

1

700 Hz + 900 Hz

1900 Hz

(Control Frequency)

2

700 Hz + 1100 Hz

—

3

900 Hz + 1100 Hz

—

4

700 Hz + 1300 Hz

—