Nortel Networks Option 11C Sender and receiver mode

NT5K21XMFC/MFE card Page403 of 544

Option11C and 11C Mini TechnicalReference Guide

Table124 on page 403lists the forward and backward frequencies for MFE.

The one backward signal for MFE is referred to as the “control” frequency.

Sender and receiver mode

The XMFC/MFE circuit card provides the interface between the Option 11C

CPU and the trunk circuit which uses MFC or MFE signaling.

The XMFC/MFE circuit card transmits and receives forward and backward

signals simultaneously on two channels. Each channel is programmed like a

peripheral circuit card unit, with its own sending and receiving timeslots in

the Meridian network.

Table 1 24

MFE Frequency values

Digit Forward direction

OG-Tx, IC-Rx Backward direction

1700 Hz + 900 Hz 1900 Hz

(Control Frequency)

2700 Hz + 1100 Hz —

3900 Hz + 1100 Hz —

4700 Hz + 1300 Hz —

5900 Hz + 1300 Hz —

61100 Hz + 1300 Hz —

7700 Hz + 1500 Hz —

8900 Hz + 1500 Hz —

91100 Hz + 1500 Hz —

10 1300 Hz + 1500 Hz —