Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent
1985-09-13
1987-08-04
Rubinson, Gene Z.
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
379 94, 379 98, 379109, H04M 1100
Patent
active
046851232
ABSTRACT:
A communication system includes a plurality of station sets each connected over two pair communication facilities to a control module. An adapter unit switchably connects an external data or voice device via a station set to either facility in response to a control signal from the control module. A data mode is established by sending a data mode request signal from the station set to the control module. An off-hook signal from a connected data device is used to request a data call. The control module signals to which facility the adapter is to connect the data call and outputs a unique visual on the data call facility. The control module prevents other calls from bridging onto or interfering with the data call. The system also permits a voice call on a facility to be converted to a data call on the other facility. Furthermore, a user can make a voice call over one facility while a data call is in progress on the other facility.
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Hsia Richard Y.
Liu Thomas C.
American Telephone and Telegraph Company
AT&T Information Systems Inc.
Caccuro John A.
Connors Matthew E.
Rubinson Gene Z.
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