Electronic switching system connected to an external computer

Details Electronic switching system connected to an external computer Electronic switching system connected to an external computer

1988-09-06

1990-05-22

Brown, Thomas W.

Telephonic communications

Telephone line or system combined with diverse electrical...

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

379 96, 379207, H04M 342, H04M 1108

Patent

active

049283049

ABSTRACT:
An electronic switching system includes a private branch exchange (PBX), an external computer, and individual telephone terminals. Programs necessary for standard switching functions are stored in a memory in the PBX. Programs that apply to only a portion of the individual telephone terminals, called service functions, are stored in the external computer. Alteration of the various service functions is accomplished by altering application programs in the external computer, thus avoiding the need to alter programs in the PBX when individual terminals need changes.

REFERENCES:
patent: 4210782 (1980-07-01), Fujita
patent: 4710952 (1987-12-01), Kobayashi
"Computer Control of Switching", C. J. Hughes, Electronics & Power, vol. 23, No. 10, Oct. 1977, pp. 806-811.
"Dimension PBX: Advances For Today, Transitions To Tomorrow", R. S. Divakaruni et al., Bell Laboratories Reard, vol. 60, No. 9, 1982, pp. 254-259.
"Gazing into the SPC Network Future Reveals Vista Of New Features", T. H. Gordon et al., Telephony, Feb. 21, 1983, pp. 86,88,93.
"System 12 Network 2000 Evolution in the United States", R. E. Pickett, Electrical Communication, vol. 59, No. 1/2, 1985, pp. 188-194.

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