Apparatus and method for handling busy calls in telephone networ

Telephonic communications – Audio message storage – retrieval – or synthesis

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Details

379201, 379213, H04M 342, H04M 350

Patent

active

055219659

ABSTRACT:
A system and method for improving the completion rate of calls encountering a busy condition wherein the customer lines connected to a stored program controlled (SPC) switch having CLASS features are provided with a repeat call feature, comprising connecting such lines encountering a busy condition to announcement circuits in said switch which provide an announcement of the availability of a repeat call service for a specified charge upon the calling party disconnecting, reconnecting, and dialing specified characters. The announcement is followed by a simulated busy signal from the announcement circuitry. The switch thereupon periodically checks the condition of the called line for a predetermined period of time and upon detecting a free condition applies a distinctive ring signal to the calling line. Upon detection of the calling line going off-hook, the switch sends standard ringing to the called line. The announcement is preferably provided from multiple announcement trunks handled in a manner to maximize the efficiency of usage of a minimum number of announcement trunks.

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E. Nussbaum et al. "Voice Storage System", Bell System Technical Journal, May-Jun. 1982, pp. 811-914 The Bell System Technical Journal, vol. 43, No. 5, parts 1 and 2 of Sep., 1964.

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