OpenSER 1.2.1

This script provides you a flexible and powerful SIP (RFC3261) proxy/server enabling easy VoIP service creation.

Features:
- robust and performant SIP (RFC3261) Registrar server, Location server, Proxy server and Redirect server
- small footprint - the binary file is small size, functionality can be stripped/added via modules
- plug&play module interface - ability to add new extensions, without touching the core, therefore assuring a great stability of core components
- stateless and transactional statefull SIP Proxy processing
- support for UDP/TCP/TLS transport layers
- IPv4 and IPv6
- support for SRV and NAPTR DNS
- SRV DNS failover
- IP Blacklists
- multi-homed (mhomed) and multi-domain support
- scripting language for configurations file. With a syntax similar to sripting languages, the configuration offers a powerful and flexible way to deploy custom SIP services.
- management interface via FIFO file and unix sockets
- pseudo-variables to access and manage parts of the SIP messages and attributes specific to users and server
- authentication, authorization and accounting (AAA) via database (MySQL, Postgress, text files), RADIUS and DIAMETER
- digest and IP authentication
- CPL - Call Processing Language (RFC3880)
- SNMP - interface to Simple Network Management Protocol
- XMLRPC -management interface via XMLRPC
- NAT traversal support for SIP and RTP traffic
- ENUM support
- PERL Programming Interface - embed your extensions written in Perl
- Java SIP Servlet Application Interface - write Java SIP Servlets to extent your VoIP services and integrate with web services
- load balancing with failover
- least cost routing
- support for replication - REGISTER offer new functions for replicating client information (real source and received socket).
- logging capabilities - can log custom messages including any header or pseudo-variable and parts of SIP message structure.
- modular architecture - plug-and-play module interface to extend the server's functionality gateway to sms or xmpp
- multiple database backends - MySQL, PostgreSQL, flat files and other database types which have unixodbc drivers
- straightforward interconnection with PSTN gateways
- impressive extension repository - over 50 modules are included in OpenSER repository