Comprehensive Multi-platform Collaboration (2003)
Kundan Singh, Xiaotao Wu, Jonathan Lennox, Henning Schulzrinne
We describe the architecture and implementation of our comprehensive multi-platform collaboration framework known as Columbia InterNet Extensible Multimedia Architecture (CINEMA). It provides a...
Towards Junking the PBX: Deploying IP Telephony (2001)
Wenyu Jiang, Jonathan Lennox, Henning Schulzrinne, Kundan Singh
We describe the architecture and implementation of our Internet telephony test-bed intended to replace the departmental PBX (telephone switch). It interworks with the traditional telephone networks...
Towards Junking the PBX: Deploying IP Telephony (2001)
Wenyu Jiang, Jonathan Lennox, Henning Schulzrinne, Kundan Singh
We describe the architecture and implementation of our Internet telephony test-bed intended to replace the departmental PBX (telephone switch). It interworks with the traditional telephone networks...
Centralized Conferencing using SIP (2001)
Kundan Singh, Gautam Nair, Henning Schulzrinne
Multiparty conferencing is an important telephony service, provided in the PSTN by conference bridges. Internet telephony can enhance this basic service by video conferencing and collaborative work....
Unified Messaging using SIP and RTSP (2000)
Kundan Singh, Henning Schulzrinne
Traditional answering machines and voice mail services are closed systems, tightly coupled to a single end system, the local PBX or local exchange carrier. Even simple services, such as forwarding...
Interworking Between SIP/SDP and H.323 (2000)
Kundan Singh, Henning Schulzrinne
There are currently two standards for signaling and control of Internet telephone calls, namely ITU-T Recommendation H.323 and the IETF Session Initiation Protocol (SIP). We describe how an...