Method of making call-wait and call-alternation in electronic pr

Details Method of making call-wait and call-alternation in electronic pr Method of making call-wait and call-alternation in electronic pr

1989-08-31

1990-12-04

Dwyer, James L.

Telephonic communications

Special services

Repetitive call attempts

379210, 379215, H04M 348, H04M 354

Patent

active

049759442

ABSTRACT:
There is disclosed a method of making a call in an electronic private branch exchange system (EPBX), calling a subscriber pre-engaged in a call and thereby performing call-wait and call-alternation. The improvement performs a call-wait state so that a calling subscriber of an EPBX can be automatically linked up with a target subscriber of the EPBX, later on, if the target subscriber is already engaed in other call when the calling subscriber makes a call to the target subscriber. The invention also provides a subscriber of an EPBX with a method capable of switching a call central office from a line to another subscriber of the EPBX engaged in the other call.

REFERENCES:
patent: 4873719 (1989-10-01), Reese

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