[Asterisk-Users] 128 kbs satelite link

[Paul Mahler]

While this thread is already in the archives, I'll throw my opinion on the
table, too.

The latency is about .25 seconds to and .25 seconds from the satellite.
There is additional propagation delay in the system. Also, TCP/IP relies on
propagation delay to optimize traffic, but doesn't handle delays this long
well. There is special purpose hardware available the sends the traffic to
an from the satellite with a different protocol. This helps the satellite
calls quite a bit. 

http://www.mentat.com/skyx/skyx-whitepaper.html

John Todd reamed me out the last time I suggested that you need this
hardware, he says he has voice working fine over a satellite link. And he
knows what he's talking about. I thought I would save him some time, this
time, by putting this in. ;-) 


There is, of course, also the problem of the upload speed. The consumer
grade satellites don't offer much upstream bandwidth. You can get better
upload speed from some of the commercial satellite carriers. 

http://www.tachyon.net/ 

Paul

 
Paul Mahler 
mail:pmahler at signate.com
phone: 650.207.9855
fax: 877.408.0105

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Bisker, Scott
(7805)
Sent: Wednesday, December 17, 2003 7:06 AM
To: asterisk-users at lists.digium.com
Subject: RE: [Asterisk-Users] 128 kbs satelite link

Similar to online gaming, I would think that the propagation delay with the
satelite connection would make calls unbearable.  Half-duplex at its worst.


my $0.02

-sb


-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com]On Behalf Of Senad
Jordanovic
Sent: Wednesday, December 17, 2003 9:49 AM
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] 128 kbs satelite link


Hi all,

Anyone has experience  using * through
128 kbs (or bigger) satelite link?

In particular I am interested to hear how many calls could be put
through 128Kbs satelite link simultaneously?

Ta
SJ

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