High efficiency facsimile transmission apparatus

Details High efficiency facsimile transmission apparatus High efficiency facsimile transmission apparatus

1991-12-27

1994-04-26

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

379100, H04N 100

Patent

active

053071743

ABSTRACT:
In a public telephone circuit using DCME and DSI, an apparatus with high line efficiency is obtained by demodulating the facsimile signal and transmitting the signal after converting it to a low transmission rate signal. An apparatus of the present invention connected to the exchanger at the trunk side input port comprises bearer interfaces connected to the DCME, FAX modems (3), a multiplexer (4) and a FAX modem discriminator (11). The apparatus demodulates the facsimile signal received from the trunk side input port and transmits the demodulated signal through the transmission line having 64 kbit/s on-demand clear channel under the CCITT recommendation Q. 50.

REFERENCES:
patent: 4894843 (1990-01-01), Yoshida et al.
patent: 4901343 (1990-02-01), Yamaguchi
patent: 5210621 (1993-05-01), Kinoshita

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