Building Telephony Systems with OpenSER (Paperback)
OpenSER is a flexible, free open-source VoIP server based on the Session
Initiation Protocol (SIP), an application-layer control (or signaling)
protocol for creating, modifying, and terminating sessions with one or
more participants, including internet telephone calls, multimedia
distribution, and multimedia conferences.
Engineered to power IP telephony infrastructures up to large scale,
OpenSER is written in pure C for Linux/Unix-like systems with
architecture-specific optimizations to offer high performance; it is
able to handle 4 million users on a single processor server. The server
keeps track of users, sets up VoIP sessions, relays instant messages,
and creates space for new plug-in applications.
It can be used on systems with limited resources as well as on
carrier-grade servers, scaling up to thousands of call setups per
second. It is customizable, being able to feature as fast load balancer;
SIP server flavors: registrar, location server, proxy server, wwwect
server; gateway to SMS/XMPP; or advanced VoIP application server.
URL:
Code:
http://www.amazon.com/exec/obidos/tg/detail/-/1847193730/
Download:
Code:
http://rapidshare.com/files/113489325/Packt.Publishing.Building.Telephony.Systems.with.OpenSER.Apr.2008.pdf
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