Methods of establishing a switching connection within a switchin

Details Methods of establishing a switching connection within a switchin Methods of establishing a switching connection within a switchin

1981-10-29

1983-11-15

Brown, Thomas W.

179 18ET, H04Q 310, H04Q 354

Patent

active

044157738

ABSTRACT:
A PBX system (20) receives a predetermined number of dialing digits from a central office which represents a subscriber station interconnected within the system. The system (20) adds a pseudo digit to the dialing digits to facilitate: (1) the use of a full compliment of dialing digits; and (2) the establishment of a switching connection with the subscriber station. The pseudo digit is then removed and the remaining dialing digits are translated into an equipment location for the subscriber station. Thereafter the switching connection is established with the subscriber station.

REFERENCES:
patent: Re28607 (1975-11-01), Richards
patent: 2585904 (1952-02-01), Busch
patent: 2680781 (1954-06-01), Avery
patent: 3264415 (1966-08-01), Burns et al.
patent: 3394232 (1968-07-01), Jaeger, Jr. et al.
patent: 3529093 (1970-09-01), Heaton
patent: 3716675 (1973-02-01), Marek, Jr. et al.
patent: 4017689 (1977-04-01), Richards et al.
"Expanded Numbering Plan", M. Boisseau et al., IBM Technical Disclosure Bulletin, vol. 17, No. 7, Dec. 1974, pp. 1973-1975.

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