SIP, RTP/SRTP, T.38 and/or G.711; - FreeSWITCH/SpanDSP; - Fluent in C/C++/C#; - Understanding of ITU-T compatible soft modems: V.34, V.32bis, V.22bis, V.22 FastConnect, V.21, Bell 103, Bell 212A, V.42, SDLC; - Understanding of the Modem-over-IP technology V.150.1, familiarity with the existing solutions (by VOCAL etc) is a plus; - RTP, jitter buffer with G.711 voice codec; - OS: Linux, Centos. Kernel experience a plus; - Device-side development experience is a must have; - Wireshark - must be able to interpret PCAP"s and to understand and correct communication issues especially for Modem-over-IP applications; - The experience in using Git and SW version control; - Strong analytical and problem solving skills; - Self-motivated type that can work independently; - Able to successfully communicate to technical audiences on varying levels of details; - English: written and spoken. |