Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

 NT5K21 XMFC/MFE card

The XMFC/MFE circuit card provides the interface between the system’s 
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 network.

When in receive mode, the XMFC/MFE card is linked to the trunk card by a 
PCM speech path over the network cards. MFC signals coming in over the 
trunks are relayed to the XMFC/MFE card as though they were speech. The 
XMFC/MFC card interprets each tone pair and sends the information to the 
CPU through the CPU bus.

When in send mode, the CPU sends data to the XMFC/MFE card through the 
CPU bus. The CPU tells the XMFC/MFE card which tone pairs to send and 
the XMFC/MFE card generates the required tones and sends them to the trunk 
over the PCM network speech path. The trunk transmits the tones to the far 
end.

5

900 Hz + 1300 Hz

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6

1100 Hz + 1300 Hz

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7

700 Hz + 1500 Hz

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8

900 Hz + 1500 Hz

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9

1100 Hz + 1500 Hz

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10

1300 Hz + 1500 Hz

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