A small Arduino library for GSM modules, that just works
Blynk library for embedded hardware
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
SIP Video Multiconference Media Server with WebRTC support.
GSM air interface
Break A5/1 cipher used in GSM
Go to github.com/vlm/asn1c for the latest version.
Implementation Of Cognitive Radio Using USRP And OpenBTS
GSM L1-L3 stack with SIP network interfaces