Arbitrary selecting of a terminal to be called in key telephone

Details Arbitrary selecting of a terminal to be called in key telephone Arbitrary selecting of a terminal to be called in key telephone

1991-11-19

1994-07-26

Kuntz, Curtis

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379 93, 379 94, 379156, H04M 1100, H04M 100

Patent

active

053331826

ABSTRACT:
A key telephone system is disclosed including a key service unit to which are connected a communication network such as public telephone network, a plurality of data terminal equipments such as personal computers, and interface conversion unit such as MODEM. When a call comes from external calling party into this system, the key service unit establishes a communication path between the network and the interface conversion unit so that succeeding data transmitted from the calling party supplied to the interface conversion unit. The succeeding communication data includes an extension number selected by the calling party, and the extension number is informed to the key service unit from the interface conversion unit. Then, the key service unit establish a communication path between a single data terminal equipment designated by the extension number and the interface conversion unit, so that the calling party can communicate with the designated data terminal equipment.

REFERENCES:
patent: 4850012 (1989-07-01), Mehta et al.
patent: 4930151 (1990-05-01), Walton et al.
patent: 4958369 (1990-09-01), Tsuchida
patent: 5086458 (1992-02-01), Bowen
patent: 5109402 (1992-04-01), Anderson et al.
patent: 5109406 (1992-04-01), Mano et al.

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