Guys:
I routinely run multiple phones over our satellite system
(I'm the VP of Network Services at SDN Global, a satellite bandwidth provider
located in Charlotte NC, US).
Just last week I went to West Palm Beach, FL US and
turned up a 10 phone emergency call center, complete with ACD queues for an
insurance company. We were able to run all ten phones (Cisco 7960Gs, SIP)
on G.729 codecs back to my * server in Charlotte NC US. No special
settings were required on * or the phones.
The satellite system *must* support *REAL* QoS and must
have jitter < ~100ms. Traditional satellite systems have *lots* more
jitter than that. The actual latency _doesn't matter_ as long as the
jitter is steady. We are even doing 'double-hop' phone calls successfully,
where the latency is double the normal latency.
Anyone that wants more detailed info contact me
off-list.
Tim McKee
VP Network Services
SDN Global
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Paul Mahler
Sent: Tuesday, September 14, 2004 4:36 PM
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: RE: [Asterisk-Users] Extending E1's over a Satellite link
A full E1 is a LOT
of bandwith to try and push over a satellite link.
John Todd has
reported success with calls via satellite.
The primary
problem you face with a satellite link is, or course, latency.
There are ways of
improving QoS over satellite links.
Paul
Paul Mahler [EMAIL PROTECTED] |
|
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Arinze Izukanne
Sent: Monday, September 13, 2004 7:24 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Extending E1's over a Satellite linkOK. What I am thinking is, It is possible to install a server running Asterisk on each end of the Satellite link, with an E1 card in each Asterisk; and the boxes are configured to pick up incomming calls on the E1 channels and pass them to the other box across the link to the other Asterisk PBX which in turn completes the call via the PSTN E1 on that side.Basically the aim is to provide a solution that works similar to RAD's VMUX but using Asterisk as the engine.I expect there would be codec translation along the way.I have this concept but how to implement it is another issue. I need someone who has experience with Asterisk already to tell me how feasible this is and to what extent it would achieve the aim of reducing bandwidth and maintaining minimal latency.Best regardsArinze
Kannaiyan Natesan <[EMAIL PROTECTED]> wrote:asterisk is a pbx software. I don't think there is a compression and uncompression utility except codec conversions. Even in those cases you can be sure that there will be loss of data as there is no lossless compression.If you have any satellite transmission and reception card which can be interfaced for voice communication with asterisk kindly share your views here, we can discuss more on that.Asterisk sends calls over internet very efficiently by reducing the ethernet overhead and the channel overheads and that is only in IAX protocol. May be this you can consider to extend for satellite communication.If you have more information kindly let us know about it whether anything of the above matches to your interest.-Kannaiyan_______________________________________________----- Original Message -----From: Arinze IzukanneSent: Monday, September 13, 2004 11:41 PMSubject: [Asterisk-Users] Extending E1's over a Satellite linkhiI want to compress and trunk 2E1 capacity over a satellite SCPC link using asterisk. I am nw to asterisk and I need suggestions on how to implement this.Best regardsArinze
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