what is sip protocol

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 relatio

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 a

agent to process the transaction. UAS core: the Core of the user proxy server. A collection of processing functions required by UAS, located on the transport layer. User Agent (UA): User Agent. A logical entity provides both the user agent client function and the user agent server function. Like proxy and redirection server, UAC and UAS are defined based on serial transactions. For example, when the user agent sends an initial invite request, it acts as a UAC before initiating a call, and when

SIP (Session Initiation Protocol, conversational initial protocol) was developed to help provide advanced telephony services across the Internet. Internet telephony (IP telephony) is evolving into a formal business telephony model, and sip

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

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

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 connecti

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

BICC vs sip-Comparison of NGN Protocol -------------------------------------------------------------------------------- One notable feature of the Next Generation Network Based on Softswitch is the separation of Call Control and bearer control. In terms of call and control of communication, from the Standard Research of the International Telecommunication Union

creating, modifying, and terminating sessions that work independently of the underlying laundry and do not rely on the established session type.Overview of 2.SIP functionsSIP is an application-layer protocol that can establish, modify, and terminate multimedia sessions (conferences) such as Internet telephony. SIP can

. Her registration information will be used by the proxy server under the chicago.com domain name to route requests sent to Carol's AOR to her SIP terminal. Once a customer creates a binding on the registration server, it may send some subsequent registration information, including the new binding or modification information for the existing binding. The 2XX response to the Register request must contain the following information. The contact header fi

instances. WebSphere Application Server V7 also provides the SIP Servlet function ｡ Does WebSphere Virtual Enterprise and WebSphere eXtreme Scale include the SIP function? Yes, both products provide the application server's SIP Session Initiation Protocol deployment function ｡ WebSphere Virtual Enterprise provides the

enhance its positioning function by using the positioning services provided by other locating server DNS and LDAP. SIP provides six types of signaling: INVITE, ACK, CANCEL, OPTIONS, BYE, and REGISTER. INVITE and ACK are used to establish a call, complete three-way handshake, or change session properties after the call is established. BYE is used to end the sessi

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

We have already learned about the SIP protocol, which we will always see in the Unified Communication Platform and VOIP business. So here we will give you a brief discussion on the development of the SIP protocol and the SIP protocol