VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
Browse on Tor/i2p, Anon p2p Chat / FileTx, Conf / Video VoIP
open5g is an open source implementation of the 3GPP 5G specifications.
Enterprise telephony recording and retrieval system
H.323 Gatekeeper for VoIP and videconferencing
SIP softphone
SIP Video Multiconference Media Server with WebRTC support.
GNU Telephony Services and Applications
Positional Audio Communication for Minecraft with Mumble
GSM air interface
ss7mon an SS7/SIGTRAN signalling monitor
PoC: Short Message Service Center (SMSC) over SIGTRAN