Unlike a proxy that forwards on the requests, a B2BUA acts as both a user agent server (UAS) and a user agent client (UAC) to further participate in the SIP transaction.
与转发请求的代理不同，B2BUA 同时充当进一步参与SIP 事务的用户代理服务器 (UAS)和用户代理客户机 (UAC)。
A user agent client (UAC) is formally defined in SIP as an endpoint that can create and manage SIP sessions.
用户代理客户机(user Agent Client,UAC)在SIP中被正式定义为能创建和管理SIP会话的端点。
A user agent client (UAC) is formally defined in SIP as an endpoint that can create and manage SIP sessions.
用户代理客户机(user Agent Client,UAC)在SIP中被正式定义为能创建和管理SIP会话的端点。
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