David Oran is a Fellow at Cisco Systems, responsible primarily for the architecture and overall design of Cisco's VoIP products. He also consults on a variety of other areas at Cisco, including backbone network design, routing protocols, and quality of service methods.

Prior to joining Cisco Mr. Oran was a Senior Consulting engineer at Digital Equipment Corporation, where he was Technical Director for the Mobile Software Business.

Mr. Oran's main interests lie in the area of the design and implementation of distributed algorithms for computer networks. He was a member of the DECnet architecture group and contributed to the design of key elements of DECnet through 3 iterations of its evolution. He was the designer of the DNA Naming Service, a highly advanced distributed directory system which was adopted by the Open Software Foundation as the local directory component of its comprehensive Distributed Computing Environment product set. Mr. Oran holds a number of patents and patents pending for his work on distributed algorithms and packet telephony systems.