hi Jeff:
thanks, yes i m a windows user, 2000 to be more accurate,
i need this to measure the performance of voip calls, i don't think
ping is what I could use, i need something that can give me the round
trip time ,delay and jitter at the time when i m sending the packets,
any ideas? if it was free much better.
Thanks

flo

Jeff Liebermann wrote:
> vopowl@gmail.com hath wroth:
>
> >Ok I presume this is a very stupid question, but I cant figure it
> >out,how can I calculate the roundtrip time time, delay and jitter in a
> >wlan?
> >I have ethereal, but i dont know where to get this info.
>
> Since you didn't bother to mention the operating system, I'll assume
> you're a Windoze user. Mac and Linux users always seem to remember to
> mention their operating system.
>
> Time delay can be done with just ping.
> Start -> run -> cmd <enter>
> ping ip_address
>
> For better resolution, I suggest FPING:
> http://www.kwakkelflap.com/fping.html
>
> You can use ping to obtain a series of latency values and feed them to
> a spreadsheet or statistics calculator to obtain variations, which is
> jitter. A simple histogram of ping results is usually sufficiently
> interesting.
>
> IPerf will measure jitter but only with UDP packets. See:
> http://dast.nlanr.net/Projects/Iperf/
> It will not do it as a "round trip" type of measurement because jitter
> is normally measured one way. You'll need two computers, one running
> the server half to get jitter results.
>
> Ethereal is a packet sniffer and decoder. It offers nothing in the
> way of performance measuring tools.
>
> What are you trying to accomplish?
>
>
> --
> Jeff Liebermann jeffl@comix.santa-cruz.ca.us
> 150 Felker St #D http://www.LearnByDestroying.com
> Santa Cruz CA 95060 http://802.11junk.com
> Skype: JeffLiebermann AE6KS 831-336-2558