Opening command transmission system and method capable of reduci

Details Opening command transmission system and method capable of reduci Opening command transmission system and method capable of reduci

1987-06-22

1989-06-06

Ng, Jin F.

Telephonic communications

Telephone line or system combined with diverse electrical...

379 94, 379 95, H04M 1100

Patent

active

048378054

ABSTRACT:
In a system for use in opening a destination terminal from an information processing unit through a communication control unit and a public telephone network, a primary opening command is delivered only once in response to an opening request from the information processing unit to the communication control unit, with the primary opening command accompanied by a dial number and a terminal identifier assigned to the destination terminal. The communication control unit at first forms a communication path by the use of the dial number included in the primary opening command and thereafter transmits to the destination terminal, as a secondary opening command, a part of the primary opening command from which the dial number has been removed. The destination terminal is opened in response to the secondary opening command under the control of the communication control unit. The information processing unit carries out operations other than the opening of the destination terminal operation during transmission of the secondary opening command from the communication control unit.

REFERENCES:
patent: 4521644 (1985-06-01), Bernard, Jr.
patent: 4640989 (1987-02-01), River et al.
patent: 4713837 (1987-12-01), Gordon

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