|
Radvision Ltd.
SIP Servers are essential network elements that enable SIP endpoints to exchange messages, register user location, and seamlessly move between networks. SIP Servers enable network operators to install routing and security policies, authenticate users and manage user locations. SIP Server applications may take many forms, but the SIP standard defines three general types of server functionality that apply to all—Proxy, Redirect and Registrar servers. These standard functionalities can be used according to the needs of the specific implementation. A SIP Server can also function as a Presence Server or a Back-to-Back User Agent (B2BUA). In addition, since SIP defines other event types, such as Winfo and Register, a SIP Server may function as an Events Server for handling the various SIP events. With the advance of SIP, server logic has become increasingly complex. SIP Servers need to deal with varying network topologies (such as public Internet networks, cellular networks, broadband residential networks), complex routing policies, security and SIP extensions. SIP Servers often need to handle high message/transaction rates and yield real-time performance and scalability, high throughput, and low delay. This chapter discusses the protocol aspects of SIP Server behavior and the usage of the RADVISION SIP Server Platform to address the challenges of effective SIP Server development.
Download
|