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.
H.323 Gatekeeper for VoIP and videconferencing
Implement Screen Pop for Avaya PBX
ss7mon an SS7/SIGTRAN signalling monitor
TAPI Phone Monitor for Windows
GSM L1-L3 stack with SIP network interfaces