TeleSoft International is a USA-based premier developer and supplier of signaling protocols for the commercial and defense communications industries. TeleSoft source code stacks include: SIP, ISDN, PPP, ML-PPP, E1 CAS R2, T1 RBS, X.25 and Multi-Link Frame Relay.Founded in 1992, TeleSoft has more than 270 licensees in over 20 countries including: AT&T, Cisco, D-Link, Fujitsu, GenBand, IBM, Lucent Technnologies, Matsushita, Motorola, NEC, NTT, Polycom, Rockwell Collins, and Telcobridges.