OpenSER is a mature, fast, high performance, scalable and flexible open source SIP server (RFC3261). OpenSER is a fork from SIP Express Router . OpenSER can work on limited resource systems as well as on carrier grade servers. OpenSER can support thousands of calls per second. OpenSER is fully customizable. OpenSER system can be easily scaled by adding more OpenSER servers. OpenSER can be used in geographic distributed VoIP platforms.

OpenSER can be used as any of the following:

• SIP registrar server
• SIP location server
• SIP proxy server
• SIP redirect server
• SIP application server
• SIP dispatcher server
• Gateway to SMS/XMPP
• Advanced VoIP application server

OpenSER can be used to offer VoIP services to users. OpenSER can offer following features:

• Internal calling
• PSTN calling
• DID forwarding
  
• Call forwarding
• Call forwarding on busy
• Call forwarding on no answer
• Voicemail(Using feature server such as Asterisk as voicemail server)
  
• LCR(Least Cost Routing)
• Enum Support
• NAT traversal support
• Replication support
• Load balancing with failover & redundancy
• Radius for AAA(Authentication, Authorization and Accounting)
• Text Messaging

OpenSER easily integrates with Asterisk to provide various solutions demanding performance and features. For example, a billing system can be developed using Asterisk and OpenSER. OpenSER does internal and PSTN termination, call forwarding, LCR(Least Cost Routing), Load balancing with failover and redundancy, text messaging, etc. Asterisk can be used as voicemail server, DID server, IVR server, etc. This was a sample scenario. Different combinations are possible to develop various systems.

OpenSER can be used for various applications. We have extensive experience in OpenSER. We have successfully implemented above features in OpenSER. We can develop wholesale and retail billing solutions based on OpenSER. We can customize OpenSER according to your requirements. We can even do  performance optimizations in OpenSER.

Please contact us today to discuss your requirements.