] On Behalf Of Bruce
Komito
Sent: Wednesday, May 11, 2005 19:11
To: Chad Wicker
Cc: asterisk-users@lists.digium.com
Subject: Re: [Asterisk-Users] Satellite Providers
I don't doubt at all what you are saying. We never tested a truly
high-end solution such as the one you described, because the cost
We looked at this earlier this year and, after evaluating several
companies, could not get it to work well enough. The problem didn't seem
to be latency, but rather lost packets in the upstream direction. Most of
the time, we couldn't even get the phone to register, but even when we
could, there
Hi All,
I am investigating the deployment of VoIP/* in Eastern European areas
where
there is no PSTN infrastructure. As you can understand DSL/Cable
connections
are a dream. The only option is satellite.
Does anyone know of any satellite providers that have low
enough/acceptable
delays for
Satellite delays are always bad. It is more a delay because of the time
it takes a signal to travel to the satellite and back to a receiving
station. You might want to check into ground station to station
microwave communications stations. The best is to have a tap to a phone
company that may
: Wednesday, May 11, 2005 1:30 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Satellite Providers
Hi All,
I am investigating the deployment of VoIP/* in Eastern European areas
where
there is no PSTN infrastructure. As you can understand DSL/Cable
The delay in the air is minor. Radio travels very fast through the air.
Almost at the speed of light. It's the electronics that are causing the
delays. The less electronics touching your signal the better. The up
and down is very fast. But then you have all the converts and the land
line
Michael D Schelin wrote:
The delay in the air is minor. Radio travels very fast through the air.
Almost at the speed of light. It's the electronics that are causing the
delays. The less electronics touching your signal the better. The up
and down is very fast. But then you have all the
Well there are several problems in your description of Satellite
services. For one you are grouping several differing technilogies
together as one. What it seemed like you were testing was a shared
bandwidth solution typically used by providers to reduce cost. It isn't
uncommon to experience
The altitude of a geostationary satellite is about 37500 km for a
round trip distance of aboyt 75000 km. Light travels at 300,000
km/second, so you have a latency of about 250 ms per hop. That is just
for the transit time to and from the bird. Since you have a two way
conversation, a caller asking
Aparantly Light Travels Faster in your world than it does in mine. As an
example, A new Satellite that was launched Just a few days ago (April 26) is in
orbit at 22,300 MILES above earth. Assuming that both ends of the transmission
are directly below the Satellite (Which they will not
Michael Welter wrote:
Michael D Schelin wrote:
The delay in the air is minor. Radio travels very fast through the
air. Almost at the speed of light. It's the electronics that are
causing the delays. The less electronics touching your signal the
better. The up and down is very fast. But then
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Bruce Komito
Sent: Thursday, 12 May 2005 4:07 AM
To: Yiannis Costopoulos
Cc: asterisk-users@lists.digium.com
Subject: Re: [Asterisk-Users] Satellite Providers
We looked at this earlier
I don't doubt at all what you are saying. We never tested a truly
high-end solution such as the one you described, because the cost would
have been prohibitive for our application. I'm sure we only evaluated
shared solutions. I guess my mistake was believing the CIR claims. At
the really
The delay in the air is minor. Radio travels very fast through the air. Almost at the speed of light.
It may travel very fast but its
also a very long way, 22,000 miles up, then 22,000 miles down, then the same
all over again. The latency for satellite is about 500ms round trip,
Even though radio travels very fast ...300,000 km/s (186,000 mph)
the speed is finite. As I said In my previous post...the satellite is
located 34,500 km (22,500 mi.) above the equator. That makes for a
round trip of 75,000 km (45,000 mi). Even at the speed of light, this
makes for a significant
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