Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1996-04-12
1997-08-26
Woo, Stella
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
379 9301, H04M 1100
Patent
active
056617852
ABSTRACT:
This invention relates to the use of a standard language and signal interface between a custom line card for connection to a corresponding arbitrary type terminal, and a switch. The line card is plugged into an interface unit which converts between the signals from the arbitrary type terminal and a standard set of signals for interfacing with the switch. The Bellcore TR303 standard is the preferred choice for communicating signals between the interface unit and the switch. The term terminal as used herein is very general and includes both simple (analog) and complex (video) telephone devices, as well as other types of customer premises equipment such as FAX terminals; it includes, for example a TV set-top box. Advantageously, only a small signal conversion program and table, and an interface card, need be developed in order to support a new type of terminal.
REFERENCES:
patent: 3760364 (1973-09-01), Yamauchi et al.
patent: 4535199 (1985-08-01), Zink
patent: 4922348 (1990-05-01), Gillon et al.
patent: 5406557 (1995-04-01), Baudoin
patent: 5526037 (1996-06-01), Cortjens et al.
U.S. application No. 07/937,814, Balgeman et al., filed Feb. 16, 1995.
Carpenter Stuart Alan
Carr Richard Gregory
Garland Stuart Mandel
Lucent Technologies - Inc.
Ulrich Werner
Woo Stella
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