Dynamic routing, if properly designed, can increase the throughput of a network. In this paper, we formulate a traffic model for multi-point videoconferencing in a VP-based ATM network and derive the link level and the conference level blocking probabilities for Fixed Routing, "Maximum Free Circuit" Routing (or M Routing) and the "Bifurcated-M Routing". The traffic bifurcation principle can also be applied to MTB, M2 , or other routing schemes to provide additional improvements. 2000 Elsevier Science B.V. All rights reserved.