System employing data compression transparent mode with...

Details System employing data compression transparent mode with... System employing data compression transparent mode with...

2005-09-06

2005-09-06

Chin, Stephen (Department: 2634)

Pulse or digital communications

Bandwidth reduction or expansion

C375S240250

Reexamination Certificate

active

06940899

ABSTRACT:
A method and an apparatus are provided for performing parameter negotiation in a data compression link. When data is sent along the communication link in a compressed form, the escape character is not modified. When sending data in an uncompressed form, the escape character is followed by a command and the escape character is modified. A parameter mode can be entered when data is being sent uncompressed. During parameter mode, parameter negotiation between the modem peers can be accomplished without interrupting the communication link.

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patent: 5729223 (1998-03-01), Trissel
patent: 5889818 (1999-03-01), Spiess
patent: 6289130 (2001-09-01), Cooklev
International Telecommunication Union, International Telegraph and Telephone Consultative Committee, Recommendation V. 42 bis, “Data Compression Procedures for Data Circuit Terminating Equipment (DCE) Using Error Correcting Procedures”, 1990.
International Telecommunication Union, Data Communication Over the Telephone Network, Recommendation V.44, “Data Compression Procedures”, 2000.
Committee Contribution, Technical Committee TR-30 Meetings, Telecommunications Industry Association (TIA), Newport Beach, CA, Nov. 22, 2000, pp. 1-3.
ITU—Telecommunications Standardisation Sector, Temporary Document Q8-041R4, Study Group 16.
Dictionary Methods, 3.17 The V.42bis Protocol, 3.18 Zip Gzip, pp. 148-149.

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