Data interface for telephone system

Details Data interface for telephone system Data interface for telephone system

1989-02-21

1991-09-03

Ng, Jin F.

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379201, H04M 1100, H04M 342

Patent

active

050461885

ABSTRACT:
A data interface for use in a communication system, comprised of a CPU module connected to a central controller of the communication system and a plurality of data terminals associated with respective subscriber sets of the communication system. The CPU module communicates with the central controller in response to user initiated requests at the respective data terminals, and executes telephone special features in association with the respective sets, such as dial-by-name, etc. The CPU module can also be connected to a personal computer, for interfacing the data terminals therewith on a time sharing basis. Furthermore, the CPU module functions as a data switch for implmenting electronic mail between the data terminals within the communication system. A communications module incorporating modems and Telex.TM. interfaces can be connected to the CPU module for establishing communication between the data terminals and one or more outside telephone lines via the communication system.

REFERENCES:
patent: 4291198 (1981-09-01), Anderson et al.
patent: 4330886 (1982-05-01), Fukuda et al.
patent: 4506111 (1985-03-01), Takenouchi et al.
patent: 4640989 (1987-02-01), Riner et al.
patent: 4653085 (1987-03-01), Chan et al.
patent: 4707694 (1987-11-01), Bauer et al.
Zymacom, "Zymacom Information Exchange", pp. 1-9, .COPYRGT.1985.

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