z9hG4bK.orgGlossary

User Agent Client (UAC)

In SIP, a user agent client, abbreviated UAC, is

RFC 3261, section 6

a logical entity that creates a new request, and then uses the client transaction state machinery to send it. The role of UAC lasts only for the duration of that transaction. In other words, if a piece of software initiates a request, it acts as a UAC for the duration of that transaction. If it receives a request later, it assumes the role of a user agent server for the processing of that transaction.

Excerpts from RFCs and Internet Drafts: Copyright © The Internet Society. All Rights Reserved.
All other material is copyrighted by the contributing authors and licensed to the public under the GNU Free Documentation License (GFDL).
For more information, please see the Copyright page.