Telecommunication controller having a telephone line sharing fun

Details Telecommunication controller having a telephone line sharing fun Telecommunication controller having a telephone line sharing fun

1987-05-11

1989-02-21

George, Keith E.

Telephonic communications

Polystation line system

Automatic or unattended

379194, 379 93, H04M 170, H04M 1100

Patent

active

048072788

ABSTRACT:
A control system has two switches for connecting a telephone device and a data device to a common telephone line. Separate circuits are provided to sense the current flowing between the telephone line and each of the devices. The circuits are coupled to the switches so that when the sensed current for one of the devices exceeds a given level, the switch for the other device is activated to disconnect the other device from the telephone line.

REFERENCES:
patent: 4000375 (1976-12-01), Kawamura
patent: 4059727 (1977-11-01), Kingswell et al.
patent: 4074081 (1978-02-01), Humm
patent: 4306116 (1981-12-01), McClure et al.
patent: 4378470 (1983-03-01), Murto et al.
patent: 4444999 (1984-04-01), Sparrevohn
patent: 4469917 (1984-09-01), Shelley
patent: 4640988 (1987-02-01), Robinton
patent: 4645877 (1987-02-01), Curtin

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