nanog mailing list archives
Re: Overflow circuit
From: "Alexei Roudnev" <alex () relcom net>
Date: Sat, 27 Mar 2004 23:20:30 -0800
500 RTT, + 150 jitter buffer, + something else... it will be 700 - 800 msec, more likely. When we worked with a few sattelliite lines (5 years ago), I never saw ping rtt less than 800 msec. Of course, it does not mean that you can not see RTT = 500 msec (but I never saw it). But I was talking aboutt other thing - ~1second delay != bad quality, it is just a delay, which means that, if you have good echo cancellers (which is interesting question) and follow talking discipline, you can talk without any problems. It explains, why satellite links + VoIP can be a good combination (moreover; after satellite delay, which is 500 - 600 msec, VoIP additional delay ,which is 50 - 150 msec, does not change overall delay so much, as in case of VoIP over bad link _vs_ traditional telephony (200 msec vs 20 msec = 10 times; 800 msec vs. 600 msec = 30%).
## On 2004-03-27 19:30 -0800 Alexei Roudnev typed: AR> AR> It means, that satellite (with it's 1 second delay and unavoidable
echo)
Geosynchronous satellite IP link RTT can be just over 500 mill-sec (real life experience) IMHO thats a rather significant difference -- Rafi
Current thread:
- RE: Overflow circuit, (continued)
- RE: Overflow circuit Joe Chin (Mar 28)
- Re: Overflow circuit Alexei Roudnev (Mar 28)
- RE: Overflow circuit Joe Chin (Mar 28)
- RE: Overflow circuit Michel Py (Mar 26)
- Re: Overflow circuit W.D.McKinney (Mar 27)
- RE: Overflow circuit Michel Py (Mar 27)
- Re: Overflow circuit Alexei Roudnev (Mar 27)
- Re: Overflow circuit Steven M. Bellovin (Mar 27)
- Re: Overflow circuit Alexei Roudnev (Mar 27)
- Re: Overflow circuit Steven M. Bellovin (Mar 27)
- Re: Overflow circuit Rafi Sadowsky (Mar 27)
- Re: Overflow circuit Alexei Roudnev (Mar 27)
- RE: Overflow circuit Mailing List Subscriptions (Mar 28)
- Re: Overflow circuit Alexei Roudnev (Mar 27)