Nortel Networks 553-3001-211 manual MFE signaling

Page 360 of 894 NT5K21 XMFC/MFE card

Table 136

MFC Frequency values (Part 2 of 2)

	Forward direction	backward direction
Digit	DOD-Tx, DID-Rx	DOD-Rx, DID-Tx
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 137 lists the forward and backward frequencies for MFE. The one backward signal for MFE is referred to as the “control” frequency.

Table 137

MFE Frequency values (Part 1 of 2)

	Forward direction
Digit	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	—

553-3001-211 Standard 2.00 September 2004