Tandem-free operation for VoIP conference bridges. - Paxton J. Smith; Peter Kabal; Maier Blostein; Rafi Rabipour (ICC, 2003)

Tandem-free VoIP conferencing: a bridge to next-generation networks. - Paxton J. Smith; Peter Kabal; Maier Blostein; Rafi Rabipour (IEEE Commun. Mag., 2003)