Data compression and decompression controlling method

Details Data compression and decompression controlling method Data compression and decompression controlling method

1992-02-07

1994-03-22

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

3701001, H04J 1500

Patent

active

052971473

ABSTRACT:
A multiplexer adds synchronizing bits to receive data transmitted from a digital communication line to a digital private branch exchange, and checks for synchronizing bits in send data transmitted from the digital private branch exchange to the digital communication line. If the multiplexer detects synchronizing bits, it switches to a non-compression mode in which it transmits selected bits of send data without compression, and transmits receive data without decompression but with addition of synchronizing bits.

REFERENCES:
patent: 4558455 (1985-12-01), Epenoy et al.
patent: 4586027 (1986-04-01), Tsukiyama et al.
patent: 4771425 (1988-09-01), Baran et al.
patent: 4890282 (1989-12-01), Lambert et al.
patent: 4903261 (1990-02-01), Baran et al.
patent: 5123013 (1992-06-01), Hirayama

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