sip ss7

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

Rfc3261 Chinese translation [version D] Parallel search: Parallel search. In parallel search, a proxy server sends multiple requests to a possible user location to receive the request response. Serial search: waits for the final response of the previous request before sending the next request. Different from serial search, parallel search sends multiple requests without waiting for the results of previous requests. Provisional response: temporary response. The server is used to indicate the prog

Today the work encountered two devices between the SIP packet crawl and analysis, and then combined with the RFC3261 document description, recorded today understand.1.SIP Protocol:Detailed RFC documentation for SIP is visible: rfc3261Session initiation, which allows you to use Internet endpoints (user agents) to find participants and allow you to create a shareab

Today, I encountered the capture and analysis of the SIP packets between the two devices. Then, combined with the instructions in rfc3261 documents, I recorded what I understood today. 1. SIP protocol:The detailed RFC documentation for SIP can be found at: rfc3261Session Initiation (Session Initiation Protocol) allows the use of internet endpoints (User proxies

Introduction 1. About the SIP protocol Currently, there are three basic communication protocols based on VOIP: H 323, SIP, and MGCP. The following describes the comparison between the H 323 protocol and the SIP protocol. H.323 was proposed by ITU. It attempts to regard IP phones as well-known traditional phones, but the transmission mode is changed from circuit s

Create a list If you are developing an application using the sip api, remember that this function is only supported in Versions later than Android (API level 9. In addition, not all devices running Versions later than Android (API level 9) provide SIP support. Add the following permissions to your application list to use the SIP 1. Android. Permission. use_sip 2.

The use of the SIP protocol is not uncommon. With the popularity of the VoIP service, we also have a better understanding of the SIP protocol. Here we will focus on the advantages of SIP. In this case, we need to compare this advantage with other protocols. Advantages of SIP: Service providers can select standard compo

We also talked about the SIP Protocol and related SIP protocol stack. In this paper, we propose a software structure and design implementation scheme of the software telephone based on the SIP protocol. this solution is based on the embedded Windows CE platform. The middleware uses the Open-Source SIP protocol stack oS

SIP is an application control signaling protocol proposed by IETF. As the name implies, it is used to initiate a session. It can be used to create, modify, and end multimedia session processes attended by multiple participants. Participants can communicate with each other through multicast, unicast, or network connection.There are clients and servers in the SIP. A client is an application that establishes a

1.1.1. Route/record-route ? Record-route can be used: -Ensures firewall proxy stays in Path ? A firewall proxy adds record-Route Header -Clients and servers copy record-route and put in Route Header for all messages Request Routing Example: only proxy 3 remains in route 1. ua1 is being ucted to invite "SIP: ua2 @ proxy1" 2. The message shocould be sent to proxy 1 3. The message shocould be sent to proxy 2 4. The message shocould be sent to proxy

Http://www.cnblogs.com/lovers/articles/2624745.html Background:A task is received to encapsulate the video SDK provided by a manufacturer and connect it to a unified video monitoring platform of a Power Grid Company. The interface protocol proposed by the platform shows the SIP and some interactive packets for the first time. Once again, I deeply feel the lack of knowledge ..... After two days, Google, forums, and blogs have all been used to

The registration process of SIP is easy to understand. First, I have a number, but if my number can be moved, how can the server find me? The SIP registration mechanism reports the location of the SIP terminal to the registration server. The registration server is only a logical role. It is not necessarily an independent physical entity. It can be the same physic

In the process of learning the SIP protocol, we need to be clear about a concept, that is, the concept of SIP relay. In order to help you better understand this aspect, we use a comparison between Chinese and English translations to help you understand this aspect. The specific information is as follows: A sip Trunk is a logical connection between an ip pbx and a

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

The business support environment mainly includes the application server, Business Management Server, and business generation environment. They work together to quickly complete the tasks that provide users with diverse and flexible value-added services based on the next generation network. The application server is the subject of the business support environment. The Business Management Server and business generation environment can be used as part of the application server. Figure 2

Label: style blog HTTP Io color OS ar sp **************************************** **************************************** **************************************** ***Easywave time: 2014.10.30 Category: Linux applications-open-source VoIP-Based on Osip-qutecom Brief Description: reprinted, please keep the link NOTE: If any error occurs, please correct it. These are my Learning Log articles ...... **************************************** **************************************** ***********

The SIP Session Initiation Protocol has been added in many systems. Therefore, we have summarized and summarized some problems of the SIP Session Initiation Protocol, hoping to help you solve some problems. For the sip faq, the Session Initiation Protocol SIP Servlet 1.0 support (JSR 116) was added for the first time i

The original link (also reproduced) http://blog.csdn.net/yetyongjin/article/details/6881491. I have modified some typos. SIPWhat kind of problems do you encounter from the private network to the public network? 1. Address translation of the package.2. SIP address translation inside SIP messages.3. The RTP address translation in the SDP in the SIP message.The exis