sip to isup

"swatchmate cube" in smart devices that appeared in 2014 was definitely a surprise to me. As a portable color detection device, it can capture the colors from any object surface, helping users to easily capture these colors. If the cube is reliable, the designer will be able to capture all the wonderful colours of nature through it. So it has become one of the first devices I want to start this year. But the cube is not listed, obviously it is not the protagonist I want to introduce

RTP/RTCP/RTSP/SIP/SDP RelationshipRTP (real-time transport protocol, Transport layer)Real-time Transport Protocol) is a Transport layer protocol for multimedia traffic on the Internet. The RTP protocol details the standard packet format for transmitting audio and video over the Internet. RTP protocols are commonly used in streaming media systems (with the RTCP protocol), video conferencing and a Push-to-talk system (with either a/p or

1. There are four Nat models for the SIP protocol.A) Full cone full coneB) Restricted cone of restricted coneC) Restricted cone of port restricted portD) symmetric ricA, B, and C are also called asymmetric Nat. 2. If the SIP terminal is behind Nat, problems may occur in its work. The reason is that the path of the sip signaling is different from that of the media

For multi-user communications, there are also common protocols for standardized management, such as the previously mentioned SDP and SIP (Session initiation Protocol), which is a control protocol belonging to the application layer, primarily used to create, modify, and abort sessions between one or more participants ( Sessions). The types of sessions include IP telephony, multimedia streaming, and multimedia conferencing.SIP IntroductionSIP invitation

http://blog.csdn.net/noiile/article/details/115436 What are the problems with SIP from private network to public network? Address translation of the package. SIP address Translation inside the SIP message. The RTP address translation in the SDP inside the SIP message. The existing structure of the network is complex

In the process of building PYQT I met a very disgusting problem, in the installation of the SIP after compiling the source code after the installation process has been prompted me: Operation not permitted , I even reinstall the system is useless, finally through the data to overcome the problem. Installing SIPDownload the SIP source code package after extracting it into its folder:python configure

I. SIP Concept Session Initiation Protocol (SIP) is an application-layer control Protocol used to establish, modify, and terminate multimedia sessions. sessions can be IP phones, multimedia distribution, and multimedia meetings. It is the core protocol of the IETF multimedia data and control architecture (RFC3261 is the latest RFC document ). The main purpose is to solve the signaling control in the IP netw

RTP/RTCP/RTSP/SIP/SDP relationship1. RTPReal-time Transport Protocol is a Transport layer protocol for multimedia traffic on the Internet. The RTP protocol details the standard packet format for transmitting audio and video over the Internet. RTP protocols are commonly used in streaming media systems (with the RTCP protocol), video conferencing and a Push-to-talk system (with either a/p or SIP), making it t

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

1.1 SIP Message Classification SIP protocol is formed in the form of layer protocol, that is, its behavior is described in a set of relatively independent processing stages, the relationship between each phase is not very close. The SIP protocol divides the messages between the server and the user agent into two categories: the request message and the response me

The SIP protocol is an application-layer control protocol used to establish, modify, and terminate multimedia sessions. It draws a lot from mature HTTP protocols (such as text format encoding and method in request messages ), the text-based UTF-8 encoding method can be used to carry the UDP or TCP protocol (UDP preferred ). Similar to the Diameter protocol, SIP also has a basic protocol and many extension p

Abstract sip, sap, and SDP are important protocols involved in NGN and 3tnet. Based on introduction and analysis of SIP, sap, and SDP protocols, this paper provides a multimedia conference application instance based on the combination of the three protocols. Key words: SIP sap SDP 1 Introduction Session Initiation Protocol (