Communication apparatus with telephone and data communication ca

Details Communication apparatus with telephone and data communication ca Communication apparatus with telephone and data communication ca

1989-06-19

1991-05-21

Ng, Jin F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379100, H04M 1100

Patent

active

050181890

ABSTRACT:
A communication apparatus has a telephone set and a data communication unit integral or combined with the telephone set and is capable of sending a call through dialing means of the telephone set. The communication apparatus comprises switching means for selectively connecting a telephone line to a line of the telephone set or a line of the data communication unit and detection means connected to the telephone set for detecting a predetermined protocol signal sent back from a destination station. Control means controls the switching means such that the switching means connects the telephone line to the telephone set at the time of calling to enable dialing using the dialing means of the telephone set, and switches the telephone line to the data communication unit when the detection means detects the protocol signal, in order to start data communication.

REFERENCES:
patent: 4585907 (1986-04-01), Giammarrusco
patent: 4821312 (1989-04-01), Horton et al.
patent: 4833705 (1989-05-01), Kobayashi
patent: 4850008 (1989-07-01), Berg et al.

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