|
North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: QOS or more bandwidth
> -----Original Message----- > From: Pete Kruckenberg [mailto:[email protected]] > Sent: Tuesday, May 29, 2001 12:10 PM > To: [email protected] > Subject: RE: QOS or more bandwidth <snip> > > Voice-over-IP benefits from statistical multiplexing as > much, if not moreso, than any other application. A > toll-quality voice call runs at ~5-6kbps (factoring silence > suppression and RTP header compression) vs. 8kbps across > compressed TDM. Do you mean G.723.1? Let's put aside that some people do not consider G.723.1 to be toll-quality. Ignoring that, I would call your 5-6 kbps number to be compression rather than statistical multiplexing. The voice packets still come out periodically every 30ms or so. The only significant statistical multiplexing you get with voice is due to silence suppression. Also, how do you actually achieve 5-6 kbps when you consider the IP overhead? Prabhu ---------------------------------------------------------------------- Prabhu Kavi Phone: 1-978-264-4900 x125 Director, Adv. Prod. Planning Fax: 1-978-264-0671 Tenor Networks Email: [email protected] 100 Nagog Park WWW: www.tenornetworks.com Acton, MA 01720
|