[Asterisk-biz] Asterisk/SIP over satellite? Iridium=Teledesic?

[Paul Rodan]

Curious. Iridium looks very similar to Teledesic which has all but
disappeared. Are they one and the same?

-----Original Message-----
From: asterisk-biz-bounces at lists.digium.com
[mailto:asterisk-biz-bounces at lists.digium.com] On Behalf Of Dorn Hetzel
Sent: Tuesday, December 28, 2004 10:24 AM
To: Tom Hayden; Commercial and Business-Oriented Asterisk Discussion
Subject: Re: [Asterisk-biz] Asterisk/SIP over satellite?

On Tue, Dec 28, 2004 at 09:31:01AM -0500, Tom Hayden wrote:
> I would imagine the latency would be less than desireable, but I've
> heard that some of the newer sats actually have decent latency.
>
Satellite operators can work to minimize the extra latency they
add in their terrestrial network, but unless we're talking 
about low orbit constellations like Iridium, the minimum 
latency is bounded by the distances involved...

For two-way satellite approximately 22300 miles times 4
round trip distance:

	A --- Sat --- B --- Sat --- A

For a minimum delay of 89200 miles / 186000 miles/sec or
0.479 seconds, which is still a quite noticeable delay
for voice.  Workable, but unmistakably noticeable.

Regards,

-Dorn
 
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