softphone sip

Chapter 3 SIP messages SIP is a text-based protocol that uses the UTF-8 character set (rfc2279 ). A sip message can be a request sent from a client to a server, or a response sent from a server to a client. Both requests (rfc3261 section 7.1) and responses (rfc3261 section 7.2) are in the format described in rfc2822. However, there are some differences between ch

What is VoIP? The complete name of VoIP is voice over Internet protocol, which is translated as Internet voice. It can be simply understood as a technology that uses an Internet system instead of a traditional telephone communication system for voice calls. In fact, the biggest difference between the two is that traditional voice calls use analog signal technology, which is prone to interference and difficult to avoid signal distortion, the capacity of traditional analog signal communication tec

SIP: Session Initiation ProtocolDocument StatusThis document has developed an Internet standard tracking protocol for Internet communications that asks for discussion and elevation of recommendations. Please refer to the "Official Internet Protocol Standard" for the standardized status of this agreement. Forward Unlimited!Copyright noticeCopyright (c) Internet community (2002). All rights Reserved!ProfileThis document describes the Session Initiation

The previous article briefly analyzes the imsdroid project. This article continues the previous article. Continue to analyze the IMS Private Identity (IMPI) Identity authentication user id for example: banketreeIMS Public Identity (IMPU) Public authentication such as: sip: 33446677887@doubango.org service settings: [java] // Sets IP address final String proxyHost = "192.168.0.1"; mConfigurationService (ConfigurationEntry. NETWORK_PCSCF_HOST, proxyHost

Document directory Registering multiple user devices The via header, forking, loop prevention An example using proxies User location Let's step out of the SIP layers and see what we have so far: using the layers, we can now create and receive sip transactions. One basic requirement in SIP is for phone devices to be able to register their location with a regi

Transferred from: blog.csdn.net/boy8239/article/details/1799542Author: boy8239 has already introduced sip-related knowledge about important SIP header domains, registration processes, and session processes. Now let's introduce the Routing Mechanism in SIP. In general, there are two routing scenarios in SIP: 1. Request

Introduction to Open-Source SIP Server OpenSIPS and open-source sipopensips **************************************** **************************************** **************************************** ***Author: EasyWave time: 2014.09.14 Category: Linux application-open source server OpenSIPS introduction statement: reprinted, please keep the link NOTE: If any error occurs, please correct it. These are my Learning Log articles ...... *******************

Address: http://www.linphone.org/eng/documentation/guide/ What is sip? (What is Sip) SIP is a protocol for establishing voice over ip cils. it is an open standard, published by the IETF organization, who made the vast majority of Internet protocols. it is too red from e-mail and HTTP. the following section describes the base principlesSIP from the user's standpoi

We know that the SIP session process is very important in the SIP Protocol process. Let's take a closer look at the content of requests and replies. We will explain the meanings of some fields sent through the sip invite. SIP INVITE The caller Tesla first initiates the INVITE message to the called party Marconi. The I

----------------------------------------------------------------------------RFC list:3550 (RTP/RTCP)-3711 (SRTP)-5245 (ICE)-3261 (SIP)-4575 (sip-conference)-4566 (SDP)5389 (Stun)-5766 (Turn)-6455 (WebSocket)-6865 (FEC)-2616 (HTTP)----------------------------------------------------------------------------One, RFC 5245 ICE Study Notes---------------------------------------------------------------------------

I'm afraid you know more about the Unified Communication Protocol. If you are not clear about it, don't worry. Next, Let's explain the content. How does the SIP Protocol promote unified communication? Next, let's take a look at some of the characteristics of the SIP protocol. Let's see how it provides support in this regard. Support for the SIP protocol in Unifie

With the development of the network, VoIP services and unified communication platforms become more and more important. The SIP protocol is an exciting focus. Some may ask, what is the SIP protocol? What's better about it? Here we will go into more details. The Chinese meaning of the SIP protocol is the process initialization protocol. The existence of the

1. Sip1.1. overview 1.1.1. Basic components of the SIP System (1) User AgentIn sip, the user proxy (UA) is the endpoint entity. The User Agent initiates and terminates a session by exchanging requests and responses. As an application, UA includes the user proxy client and user proxy server, As follows:· User proxy client (UAC): the initial SIP request of the clie

With the development of VoIP and NGN technology, the Openh323 era is about to transition to the SIP era, in the open-source protocol stack, which occupies a dominant position, it puts a complex and advanced protocol stack presented in the eyes of ordinary programmers, which has made a contribution to the popularization of the system. However, when in the SIP era, there has been a state of separatist,

I believe that you have mastered the basics of IMS and SIP protocols and some precautions. These contents are also described in two articles, "briefly describing the SIP protocol in IMS" and "Problems Existing in IMS and SIP. Next we will explain the SIP Protocol extensions in IMS. 1.

Chapter 7 Registration Section 1 Overview SIP provides a capability to discover users. If a user wants to enable a session with another user, the SIP must be able to discover the current host of the target user. This discovery process is often used by SIP network elements, such as proxy servers or redirection servers. These servers can receive a request and detec

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, SIP s

1 IntroductionVoIP is the most representative of the development of the new generation of Internet age.One of the application technologies. As a signaling control protocol in VoIPThere is great potential for growth. Therefore, in order to better promote the development of VoIP servicesIt will be a major research topic to solve the problem of SIP traversing NAT. This article mainlyBased on the stun method, it aims at its inability to traverse symmetric

Transferred from Http://www.ring180.com/sip/28-pstn-interworking/59-sipThursday January 2009 03:46 Sharp Voice Communication 1 , early media Whether in the PSTN or VoIP network, the final purpose of a call is to have two users talk (conversation). Here we will be generated by conversations between the users of the media called the regular media ("regular medium"). Early media ("Early media") is compared to conventional media. Typically, the user's co

Document directory Offer-answer 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 cocould work using these layers. this second part completes the discussion by covering the way sip de