Line powered modem

Details Line powered modem Line powered modem

1980-11-03

1983-07-26

Rubinson, G. Z.

Pulse or digital communications

Repeaters

Testing

375 8, H04M 1900

Patent

active

043955908

ABSTRACT:
A modem for coupling a data terminal or other apparatus to a telephone line and deriving its operating power for both transmitting and receiving operation from the telephone line, and providing electrical isolation between the telephone line and the data terminal.

REFERENCES:
patent: 3539727 (1969-02-01), Pasternack
patent: 4171467 (1979-10-01), Evenchik
The Bell System Data Set catalog, pp. 2-56.
Bell Systems Data Set 113A product literature, Description and Operation; pp. 1-6, Installation and Connection, pp. 1-7; and Test Procedure, pp. 1-4.

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