sip sdp

If You know this phone is ringing (an ALERT q.931 message, for instance) you send a 180 ringing. If You receive a notification indicating this call is progressing, but you don't know for sure whether the user I s being alerted or not, your send a 183 session Progress message. Both can indicate early media with SDP. If There is no SDP, the end device (softphone/gateway/etc.) has to generate the ringback tone

This article is from csdn lidp and reposted the famous source. Thank you. For information and technology trends in the VoIP industry, see www.voip123.cn. For the registration function, Asterisk SIP protocol stack provides two services, 1. Asterisk is used as the SIP client and registered with other sip servers.2. Asterisk is used as the

Let's talk about the "things" Of The osx sip mechanism"I. Preface OSX is an exclusive operating system developed by Apple for Mac products. It is the first FreeBSD-based system to adopt an object-oriented operating system. From the OSX V10.0-V10.8 version, OSX systems are all codenamed big cats, maybe old Joe is also a fan of cats (I am also a loyal fan of cats, haha ), the OSX system is evolved as follows: 2001Mac OSX 10.0 Cheeta Cheetah 2001Mac O

Tags: blog http os ar using file data on artOriginal: Asterisk real-time add SIP number--sqliteAsterisk real-time add SIP number--sqliteToday, I tried to use Asterisk's real-time mode to add a SIP account to SQLite without restartingAsterisk, no need to reload, you can successfully register a SIP account, the following

Session Initiation Protocol,sip is a signaling protocol that establishes, modifies, and terminates a session between two endpoints. SIP can be used to establish a multicast session for two-party calls, multiparty calls, or even Internet calls, multimedia calls, and multimedia distribution. The JSR 116:sip Servlet API is a server-side interface that describes cont

There are many tools used in Python in the swig (in English meaning: booze), sip (in English), and Boost.python. SIP is developed from Swig, and is specifically designed for Python to call C + + modules (see SIP naming to see, very interesting).SIP usage, in the official website of the

A technology, especially network-centric and communication-centric technology, has its own transmission protocol. Now we will introduce some knowledge about Cisco Unified Communication Protocols. So what is SIP when Cisco's unified communication protocol is used? Why is it used? Support for the SIP protocol in Cisco Unified CommunicationThe SIP Protocol provides

1. The following is the test matrix 1 (the problem is not resolved ): CalleeCaller Jain-Sip-UA X-Lite IP-video Jain-Sip-UA It can communicate normally, but the number of frames is not enough and it is not smooth. When the call is received, the xlite is dropped. After the IP address is answered, "keep" is displayed, and UA audio and video can be received. X-Lite

I. background and functions of the SIP protocolSIP (Session Initiation Protocol) is developed to help provide advanced telephone services that span the internet. Internet telephone IP telephone) is evolving to a formal business telephone model, and SIP is an important member of the series of protocols to ensure the implementation of this evolution.SIP is part of the IETF standard process. It is built based

This article, the original connection: http://blog.csdn.net/freewebsys/article/details/46546205, reprint please indicate the source!1, about FreeSWITCHFreeSWITCH is a soft-switching solution for telephony, including a softphone and soft switch to provide voice and chat product drivers. The FreeSWITCH can be used as a switch engine, PBX, multimedia gateway, and multimedia server.FreeSWITCH supports a variety of communication technology standards, including SI