[Asterisk-Users] Extending E1's over a Satellite link

[Tim McKee]

Actually, a single hop satellite conversation isn't much worse than some
cell phone systems.  ~350ms latency.

After a few moments of talking the normal person adjusts to it without much
notice.  Indeed, many overseas links in the past (and present for that
matter) are done via satellite.

Tim 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Julio Arruda
Sent: Tuesday, September 14, 2004 5:33 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Extending E1's over a Satellite link

Tim McKee wrote:
> 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.

Out of sheer curisity, the delay itself doesn't make the conversation 'bad'
(meaning, walkie-talkie/roger-and-over-like ?) The codec itself should
introduce some dozens of ms, but the satellite, is not at least 300ms one
way or something like that ? adding the codecs, and the jitter buffers and
etc..I wonder how good/bad is it ?
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