2020-02-17 10:46:41 作者： james.zhu 来源：Asterisk开源派 评论：0点击： Session Description Protocol(简称是SDP)全称是会话描述协议，此协议用来创建一种协商机制，这种协商机制是由呼叫控制协议创建的介于两个呼叫用户之间的会话进行，协商机制支持的四大协商方式是 ...

2020-03-31 09:44:19 作者：james.zhu 来源：Asterisk开源派 评论：0点击： 在前面的章节中，我们完整介绍了SIP中SDP的offer/answer交互 ...

In Part 1 of our SIP primer, I covered the SIP foundation layers starting from the message structure and ending with the SIP transactions. We saw how phone registrations and proxies could work using ...

SIP session requests leverage the “session description protocol (SDP)” to define session characteristics such as media type, codec, and so on. While the IETF and SIPforum have standardized many of the ...

Session Initiation Protocol (SIP) is a signaling protocol that is used to set up, modify, and terminate a session between two endpoints. SIP can be used to set up a two-party call, a multi-party call, ...

Session initiation protocol (SIP)-based voice-over-IP (VoIP) designs certainly provide some interesting benefits over today's Class 5 switching systems. SIP enables capabilities like presence, instant ...

The 18th Internet Telephony Conference & Expo (ITEXPO) came to Los Angeles last week, and being the opportunistic sort, I decided to get myself on the press list. That's one of the advantages of ...

Update: We're in the last throes of winter break 2019, which means most Ars' home office phones can stay dormant for a few more days. As such, we've been resurfacing a few classics from the ...

Broadcasting over IP is rapidly becoming the paradigm by which broadcasters are planning future broadcast network infrastructures. Within the diverse range of broadcast IP devices coming onto the ...

A bug in a Realtek software development kit (SDK) means any third party devices with software that uses the SDK could inherit a vulnerability in their Session Initiation Protocol (SIP) implementations ...