iptel.org Open-Source Projects
Several open-source projects have their home here at http://iptel.org/ . They all play nicely together. The complete software suite with SERi , SERwebi , SERctli , and SEMSi  is known as SER Suite.
SER - SIP Express Router 
The high-performance SIP Server.
SERweb - SER Web Interface 
A web-based front-end for provoisioning and management of SIP service subscriptions.
SERctl - SER Command Line Administration Tools 
A set of command line administration tools for SER.
SEMS - SIP Express Media Server 
A media server for voicemail, interactive voice menus (IVRi ), announcements, etc.