Hi All They are lots of links for estimating the NEB (Nominal Ethernet Bandwdith) for various voice codecs: http://www.cisco.com/en/US/tech/tk652/tk698/technologies_tech_note09186a008… http://www.newport-networks.com/cust-docs/52-VoIP-Bandwidth.pdf However I'm finding it hard to find papers about how to calculate NEB for video codecs like H.263. Any hints? -- Dr. Rodney G. McDuff |Ex ignorantia ad sapientiam Manager, Strategic Technologies Group| Ex luce ad tenebras Information Technology Services | The University of Queensland | EMAIL: mcduff(a)its.uq.edu.au | TELEPHONE: +61 7 3365 8220 |