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_note09186a0080... 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?