nanog mailing list archives
Re: Clearwire May Block VoIP Competitors
From: Mikael Abrahamsson <swmike () swm pp se>
Date: Sat, 26 Mar 2005 20:55:42 +0100 (CET)
On Sat, 26 Mar 2005, Adi Linden wrote:
90kbps may be low bandwidth but the packets per second are a killer for some equipment. VoIP typically has small packets, 80 bytes or 160 bytes, whereas your webbrowser has most packets close to the max MTU, usually 1500 byte packets. There is quite a bit of wireless gear that buckles under the stress of very few VoIP streams. Those few streams add up to much less then the theoretical advertised throughput.
A typical voip call is a packet in each direction every 20ms, this makes a total of 100pps.
Translated into a tcp stream with one ack per data packet, this would mean 600 kilobit/s bandwidth usage with the same pps. I would be quite upset if I couldn't use 600 kilobit/s for approximately the same time I would use voip per day (which truthfully wouldnt be much).
-- Mikael Abrahamsson email: swmike () swm pp se
Current thread:
- Clearwire May Block VoIP Competitors Fergie (Paul Ferguson) (Mar 25)
- Re: Clearwire May Block VoIP Competitors Eric Gauthier (Mar 26)
- Re: Clearwire May Block VoIP Competitors Adi Linden (Mar 26)
- Re: Clearwire May Block VoIP Competitors Mikael Abrahamsson (Mar 26)
- Re: Clearwire May Block VoIP Competitors Paul G (Mar 26)
- Re: Clearwire May Block VoIP Competitors Adi Linden (Mar 26)
- <Possible follow-ups>
- Re: Clearwire May Block VoIP Competitors Robert Bonomi (Mar 26)
- Re: Clearwire May Block VoIP Competitors Chip Mefford (Mar 28)
- RE: Clearwire May Block VoIP Competitors Hannigan, Martin (Mar 26)
- Re: Clearwire May Block VoIP Competitors Robert Bonomi (Mar 28)
- RE: Clearwire May Block VoIP Competitors Howard, W. Lee (Mar 30)
- Re: Clearwire May Block VoIP Competitors Paul Vixie (Mar 30)
- Re: Clearwire May Block VoIP Competitors Stephen J. Wilcox (Mar 30)
- Re: Clearwire May Block VoIP Competitors Jared Mauch (Mar 30)
- Re: Clearwire May Block VoIP Competitors John Osmon (Mar 30)
- Re: Clearwire May Block VoIP Competitors Paul Vixie (Mar 30)
- Re: Clearwire May Block VoIP Competitors Eric Gauthier (Mar 26)