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GNU Telephony
Open-source telephony, preserved and being revived
Conference Archives

Historical Presentations & Talks

Preserved records of key conference keynotes, technical workshops, and developer hackathon presentations authored by GNU Telephony contributors.

Secure Calling with GNU SIP Witch and ZRTP

Southern California Linux Expo (SCALE 8x)
February 20, 2010Los Angeles, CaliforniaDavid Sugar

David Sugar outlines the threat of centralized telecom surveillance, explains why the traditional PBX architecture fails to preserve privacy, and demonstrates peer-to-peer SIP routing with SAS vocal verification.

#VoIP Security#ZRTP#SIP Witch#Privacy

GNU Free Call: Decentralizing Voice Communications

GNU Hackers Meeting (GHM 2011)
October 2011Paris, FranceDavid Sugar

A deep architectural presentation on integrating GNU SIP Witch with distributed hash tables (DHT) and personal server hardware (FreedomBox) to eliminate centralized telephone networks.

#Decentralization#FreedomBox#Peer-to-Peer#Mesh Networks

Free Software Telephony & The Modern Telecom Switch

FOSDEM 2008 (Telephony & VoIP Devroom)
February 2008Brussels, BelgiumDavid Sugar & Werner Dittmann

Technical review of libzrtpcpp, C++ memory management in uCommon, and implementing low-latency media queues in GNU ccRTP.

#C++ Telephony#uCommon#ccRTP#FOSDEM