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X&YComm SIPSP-Proxy is a standard SIP Registrar & Proxy server software running on ordinary X86 PC and Windows operating system, which compatible to IETF SIP protocols.
Targeting at IP Telephony Service Provider, SIPSP-Proxy is recommended to work with multiple SIPSP-PBX servers as a central call router, which automatically forwards calls between different SIPSP-PBX servers.
Written in pure C language, SIPSP-Proxy has proven high performance and stability, with very few consumption of system resources.
 Powerful Call Routing
-- Call routing policies are supported with flexible Dial Plan and ACL.
-- Multiple routes selection for one destination.
-- Both sequential and parallel call forking.
High Performance
At least 2000 concurrent registered users and calls are easily supported per single P4 2.4G PC.
Stable and Reliable
SIPSP-Proxy software itself is highly proved stable, and besides, it is kept monitored by an additional failover watchdog software SIPSP-Startup and will be automatically restarted whenever abnormal.
Easy Setup and Maintenance
-- Integrated installation wizard. A step-by-step wizard provides integrated installation and settings of all the required components, including SIPSP-Proxy software & web pages, MYSQL/MSSQL database, JavaSDK, Tomcat, etc.
-- Easy Maintenance. Web-based configuration and monitoring, as well as Telnet console, make the whole system is easily under control and management.
Auto NAT Traversal
Rich call features are supported, like Call Forward, Call Transfer, Call Block, Call Screening, Fax, Instant Message, ACD (with SIPSP-IVR), Voicemail (with SIPSP-IVR), and more customized features.
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