HelloSoft's Comprehensive RFC 3261 SIP Stack

HelloSIP™ enables rapid deployment of a wide range of SIP applications including voice and video over IP, multimedia conferences and Distance learning.
HelloSIP is easy to integrate comprehensive APIs with the rest of the system on a range of wired and wireless devices such as IP phones, mobile phones, gateways, set-top-boxes and PCs. The
highly-optimized implementation further provides high flexibility and rapid time-to-market for the widest variety of SIP applications.
HelloSIP™ is ported on all major HLOS/RTOS and processor cores, extensively interop-tested with almost all major SIP servers and works with all major IP phones, IP PBXs, proxy servers and gateways. Generic interfaces further make the stack easily portable and extensible and easily customizable to achieve the desired product and service differentiation with short schedule to market.