Call progress tone generation in a communication system

Details Call progress tone generation in a communication system Call progress tone generation in a communication system

2007-02-22

2008-09-02

Hong, Harry S (Department: 2614)

Telephonic communications

Centralized switching system

With generating of call associated substation signal

C379S165000, C379S353000

Reexamination Certificate

active

07421071

ABSTRACT:
A method of operating a wireless calling device comprises connecting to a call tone provider configured to provide call tones, transferring a plurality of call tone requests to the call tone provider, receiving a plurality of call tones from the call tone provider in response to the plurality of call tone requests, transferring a call setup message to a telecommunication switch to initiate a call, receiving a call message from the telecommunication switch in response to the call setup message wherein the call setup message indicates a status of the call, processing the call message to select a one call tone from the plurality of call tones based on the status of the call, and audibly playing the one call tone.

REFERENCES:
patent: 6018654 (2000-01-01), Valentine et al.
patent: 7050564 (2006-05-01), Boldt
patent: 7203304 (2007-04-01), Boldt

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