[isp-satellites] Re: VoIP and Tachyon

["Michael Painter" <tvhawaii@...]

IIRC, the last time I calculated max slant range vs zenith location's
contiribution to RTT, it didn't amount to all that much difference.

--Michael


----- Original Message -----
From: "SatMan1" <SatMan1@...>
To: <isp-satellites@isp-satellites.com>
Sent: Thursday, September 26, 2002 10:54 PM
Subject: [isp-satellites] Re: VoIP and Tachyon


> Craig,
>
> you really get less than 500ms over satellite?  Is the bird falling out of
> the sky or you directly beneath it?  With a GEO bird the RT time is very
> rarely under 500ms.  Possible if both sites are at EL angles above about
65
> degrees (RT= approx 480ms), but then add in the latency of the terrestrial
> links at each end and you are above 500ms.
>
> SatMan
>
> ----- Original Message -----
> From: "Craig A. Waltzer" <cwaltzer@...>
> To: <isp-satellites@isp-satellites.com>
> Sent: Thursday, September 26, 2002 16:06
> Subject: [isp-satellites] Re: VoIP and Tachyon
>
>
> > I have experienced excellent VoIP QoS over satellite.  As long as the
> > provider delivers round trip pings of less than 500ms.
> >
> > Craig A. Waltzer
> > Chief Executive Officer
> > Aventura Networks, Inc.
> > 2025 NE 198th Terrace
> > Miami, Florida 33179
> > www.AventuraNetworks.com
> > Craig@...
> > 305-937-2000 Office
> > 305-402-2832 Fax
> >
> >
> > -----Original Message-----
> > From: alex@..."mailto:alex@...">mailto:alex@...> > Sent: Thursday, September 26, 2002 9:05 PM
> > To: isp-satellites@isp-satellites.com
> > Subject: [isp-satellites] Re: VoIP and Tachyon
> >
> > Seriously. VoIP and sattellites are incompatible, if you expect any
> > reasonable latency.
> >
> > -alex
> > On Thu, 26 Sep 2002, Cameron Earnshaw wrote:
> >
> > >
> > > Anybody had any luck doing VoIP over Tachyon's service?  I have had
> > > poor results to date.  With H.323 the RX audio was good but latency
> > > was so bad as to be very distracting and the TX audio was jittery.
> > > With the SNOM 100 SIP phone I get no audio at all.  I'm just
> > > wondering what other Tachyon users are doing?
> > >
> > > Cameron
> > >
>
>




>