Transmission system for transmitting G3 facsimile signals and co

Details Transmission system for transmitting G3 facsimile signals and co Transmission system for transmitting G3 facsimile signals and co

1992-10-23

1994-06-21

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370112, 379100, 358434, H04J 300

Patent

active

053233980

ABSTRACT:
A speech signal coding system including a speech signal encoder for dividing received speech signals into a plurality of frames each having a predetermined time interval and for converting the speech signals into digital speech parameters. The system includes a multiplexer for multiplexing the output digital data from the speech signal encoder into a predetermined frame format; a control frame generator for generating, in response to an inputted facsimile signal, a control frame having speech data frame configuration for identifying a facsimile signal identification data indicating the input signal as the facsimile signal. A facsimile signal demodulator converts the facsimile signal into digital data and a bit-synchronous multiplexer multiplexes the digital data. An output device outputs the speech data frame of the multiplexer to a digital transmission line and further outputs, when a facsimile signal is input, the control frame and facsimile data multiplexed as the bit synchronous data onto the digital transmission line.

REFERENCES:
patent: 4876696 (1989-10-01), Yoshikawa
patent: 4995073 (1991-02-01), Okata et al.
patent: 5042028 (1991-08-01), Ogawa
patent: 5050005 (1991-09-01), Kagami
patent: 5117453 (1992-05-01), Piasecki et al.
patent: 5136634 (1992-08-01), Rae et al.

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