CompactSIP stack deployed on Symbian-based phones

AUSTIN, TX. September 12, 2008 – TeleSoft International announces that its CompactSIP Voice Over IP (VoIP) SIP protocol stack, is currently deployed running on a wide range of Nokia™ Symbian-based mobile phones. A CompactSIP SDK is now available pre-ported to the Symbian™ operating system and pre-integrated with the industry’s leading voice and media engines to enable application providers and OEMs to provide high quality voice communications while decreasing both time-to-market and technical risk. Typical handset applications are low/no cost VoIP calls over cellular networks using a data service and VoIP over WiFi to a broadband access point.

About TeleSoft

TeleSoft,, develops and licenses digital communications protocol source code stacks and reference designs that embed VoIP, telecomm and datacomm capabilities into consumer electronics and business systems. The company’s compliance-tested, OS-independent codes include CompactSIP, PRI & BRI ISDN, QSIG, ML-PPP, PPP, T1 Robbed Bit, E1 CAS R2, Frame Relay, X.25 and more. TeleSoft products accelerate time-to-market, minimize technology risk, and decrease the cost of product development and maintenance. TeleSoft’s worldwide base of more than 240 customers includes, among others, AT&T, Cisco, D-Link, 3Com, Dialogic, Fujitsu, GTE, GenBand, IBM, Intel, Lucent, Multi-Tech, NEC, NTT, Polycom, TelcoBridges, US Robotics, Vertical Communications and ZyXEL.

The TeleSoft CompactSIP Session Initiation Protocol SDK supports 44 RFCs including RFC 3261, TCP, SDP, PRACK, SIMPLE, Security and NAT Traversal. CompactSIP provides one of the smallest memory footprints for cost-sensitive Internet telephony applications such as Mobile Handsets, IP phones, Chip-sets, Gateways, EV-DO PC datacards, PDAs and Pocket PCs – applications where very small code sizes and high performance operations are top priorities. CompactSIP is a modular solution that is optimized to suit the application thus keeping memory footprint, processor usage and cost to a minimum.