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User-Agent Client

Vangie Beal
Last Updated May 24, 2021 7:58 am

Abbreviated as UAC, in VoIP, a client application in an SIP system that initiates the SIP request that is sent to the UAS. The combination of the UAC and the UAS is called the SIP user agent. The SIP user agent allows peer-to-peer calls to be made using a client-server protocol.