System and method for emulating ringback transparently
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United States of America Patent
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Issued Date -
Jan 1, 2004
app pub date -
Jun 28, 2002
filing date -
Jun 28, 2002
priority date (Note) -
Abandoned
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Abstract
A system and method is presented for providing a ringback tone at the initiating end of a call while substantially reducing bandwidth usage. The initiating end initiates a call through a network. The receiving end of the call responds by transmitting an alerting message containing information on the characterization of a ringback tone to the initiating end of the call. At the initiating end of the call, the proper ringback tone is determined based on this information, and a ringback tone is generated. When the call is picked up at the receiving end, a transmission to the initiating end alerts the initiating end to cease the ringback tone. Silence suppression may be used at the receiving end to prevent the transmission of an audio stream before the terminal (e.g., a phone) is picked at the receiving end.
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