Will Ivancic
Senior Research Engineer
NASA - Glenn Research Center

Dan Shell
Senior Systems Engineer
Cisco Systems

The convergence of voice/video and data services over an intranet or internet requires the use of differentiated services techniques. IP is the transport protocol for all of these services and by using the IP precedence bits, we can adjust the quality of service needed for delivery of these services over a network.

This presentation will include a demonstration of Voice over IP on a GEOS satellite link that will also be using the same T1 for data traffic. Also discussed will be the current research into using ATM and Packet Over Sonet (POS) with IP precedence/ weighted red (WRED) to compare the QoS and effeciency of these types of physical transports at OC-3 (155 Megabits per second) rates.