Communication with a non-telephone terminal via a telephone swit

Details Communication with a non-telephone terminal via a telephone swit Communication with a non-telephone terminal via a telephone swit

1989-05-24

1991-02-19

Ng, Jin F.

Telephonic communications

Telephone line or system combined with diverse electrical...

To produce visual-graphic copy

379106, 379102, 379104, 379105, 379 93, H04M 1100

Patent

active

049951092

ABSTRACT:
A telecommunications system allows data communications between a data center and a non-telephone terminal via a telephone switching network. A terminal adapter connected to a first telephone line of the network is also connected to the non-telephone terminal and a telephone terminal. A center adapter is connected between the data center and a second telephone line. The center adapter originates a first call destined to the terminal adapter and releases it upon detecting the call terminating to the terminal adapter. The center adapter then originates a second call destined to the same terminal adapter. The center adapter detects the successive terminations of the two calls to connect the telephone line to the non-telephone terminal to allow data transmission between the data center and the non-telephone terminal.

REFERENCES:
patent: 3702904 (1972-11-01), Bard
patent: 4022977 (1977-05-01), Nomura
patent: 4126762 (1978-11-01), Martin et al.
patent: 4232195 (1980-11-01), Bartelink
patent: 4654868 (1987-03-01), Shelley
patent: 4845773 (1989-07-01), Attallah
patent: 4847892 (1989-07-01), Shelley
"Interface for No-Ringing Communication Service" publ. by Nippon Telegraph and Telephone Co., Ltd., Japan, Oct. 15, 1987.
Understanding Telephone Electronics, Fike, 1983.

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