----- Original Message -----
From: "Daniel Senie" <[email protected]>
To: "James Zhu" <[email protected]>
Cc: "Chris Metz" <[email protected]>; "Larry Schott" <[email protected]>;
<[email protected]>
Sent: Tuesday, June 06, 2000 12:35 PM
Subject: Re: IP over Satellite Questions/References
> James Zhu wrote:
> >
> > Chris,
> >
> > You can checkout Tachyon.net, they just launched *two* way broadband
> > internet access over satellite in march. .9m VSAT dish. Traffic are
carried
> > over MPEG/DVB. Their service targets to small-mid size businesses and is
QOS
> > provisioned. They currently have coverage in Europe/North/South America.
>
> Unless something's changed, they don't offer Internet access, just
> private networking. If that's your need, then it'll work. If you really
> didn't want to install hundreds of locations, it may not be what you
> want.
That is not correct. Tachyon System was designed for Internet broadband
access from the begining. They provide the satellite link to ISP and ISPs
signs up individual customer as they normally do with a DSL or modem line.
> If I could get bidirectional VSAT at DSL prices (with reasonable
> equipment charges) and including Internet connectivity, I'd certainly
> have a number of applications for that. The Gilat/DISH offering is in
> that direction. Nothing else I've seen yet is available for less than
> 100 times the price (monthly) and excessive equipment pricing (i.e. no,
> I don't want a 12 foot dish and dedicated C-band transponders).
>
Gilat is consumer oriented. Tachyon is business oriented. Different
throughput speed, provisioning, service quality. (ie. They guarantee up
time.)
cheers,
-jaz
>
> > ----- Original Message -----
> > From: "Chris Metz" <[email protected]>
> > To: <[email protected]>
> > Sent: Monday, June 05, 2000 7:27 PM
> > Subject: IP over Satellite Questions/References
> >
> > > Hi-
> > > Based on a reference to Dish Network and Gilat I heard the other day
on
> > > CNBC I am suddenly very curious about the use of satellite for
broadband
> > > access to the home or business and IP over Satellite in general. As a
> > > generalization of the TCP over satellite problems and solutions that
have
> > > been well documented over the last few years I was wondering about the
> > > following:
> > >
> > > - IP/MPEG/DVB? So are IP packets carried in the MPE capabilities of
MPEG
> > > for transmission over DVB systems?
> > >
> > > - What about special satellite-specific link layers? Are MPEG frames
> > > carried inside these L2 protocols?
> > >
> > > - How is the satellite uplink for a bidirectional system done? I am
> > > familiar with the DirecPC approach of using a terrestrial (dial, ISDN)
> > > uplink from the home. Is the bandwidth symmetrical or asymmetrical?
> > >
> > > - How much bandwidth is possible? I see that DirecPC advertises 400Kb.
> > What
> > > are the issues that affect how much bandwidth one can use?
> > >
> > > Any conferences/tutorials/whitepapers/books that people can recommend
to
> > > learn about this stuff?
> > >
> > > Thanks ...
> > >
> > >
> > >
> > > Chris Metz
> > > Lead IP Architect
> > > Solutions Integration
> > > Service Provider Line of Business
> > > Cisco Systems
> > > email: [email protected]
> > > offic phone: 408-525-3275
> > > home office: 914-241-0423
> > > pager: 800-365-4578
> > > Internal URL: http://wwwin-people.cisco.com/chmetz/chmetz.htm
> > >
>
>
> --
> -----------------------------------------------------------------
> Daniel Senie [email protected]
> Amaranth Networks Inc. http://www.amaranth.com
>
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