P2P-SIP Peer to peer Internet telephony using SIP Kundan Singh and Henning Schulzrinne Columbia University, New York May 2005 .
P2P-SIP Peer to peer Internet telephony using SIP (Session Initiation Protocol) Kundan Singh and Henning Schulzrinne Columbia University, New York June.
CS234/NetSys210: Advanced Topics in Networking Spring 2012 SIP and VoIP Kundan Singh, and Henning Schulzrinne "Peer-to-peer internet telephony using SIP"
P2P-SIP Peer to peer Internet telephony using SIP
P2P-SIP Peer to peer Internet telephony using SIP (Session Initiation Protocol)
CS234/NetSys210: Advanced Topics in Networking Spring 2012 SIP and VoIP