To increase the security and the expansionary of the system, it uses SIP as a core protocol.

为增加系统安全性和可扩展性，采用下一代互联网络的核心协议—SIP作为控制信令协议。

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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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Also, many of the IP telephony vendors are now focused on SIP as the control protocol for their IP telephony deployments.

另外，许多IP电话技术供应商现在都把SIP作为IP电话技术部署的控制协议。

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SIP, as a way to move 130 or so industries out of Suzhou's city centre.

ECONOMIST: The trouble with Singapore��s clone

The clubhouse at Keeneland is at the head of the stretch, not near the finish line, and those granted entry are also offered their own private lawn from which to watch the races and sip drinks as they watch the horses come around the turn and head for home.

FORBES: Keeneland Race Course Is A Sure Bet

Affordable urban art can be found at 83 Club Street, a bar where visitors can buy what they see on the walls as they sip cocktails and eat French-influenced bites such as marinated salmon blinis and roasted beer and Harissa sausage.

BBC: An arts infusion in sterile Singapore