Voice service system and method of accessing the same
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United States of America Patent
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Apr 5, 2011
Grant Date -
Jul 21, 2005
app pub date -
Dec 13, 2004
filing date -
Jan 20, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A VoIP-UMS accessed via a private branch exchange or an IP-phone using a Session Initiation Protocol (SIP). More particularly, the method has access the VoIP-UMS in which an initial call setup message is sent which includes call information upon accessing the VoIP-UMS for the purpose of using functions, such as voice mail or the like. When a user accesses a voice service system over a network directly from a terminal, the user accesses via an SIP server, or the user accesses via a switching system, the VoIP-UMS can discriminate connected calls easily, and determinate and respond to the calls rapidly because an INVITE message, which is a Session Initiation Protocol message attempting to access the VoIP-UMS, includes an INFO message that is a message on call information.
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Family
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