[Asterisk-Users] Satellite Providers

[Terry H. Gilsenan]

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com 
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> Bruce Komito
> Sent: Thursday, 12 May 2005 4:07 AM
> To: Yiannis Costopoulos
> Cc: asterisk-users at lists.digium.com
> Subject: Re: [Asterisk-Users] Satellite Providers
> 
> 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 was 
> such a large amount of breakup (in the up direction) that it 
> was nearly unusable.  We tried low-end, consumer type 
> services and they didn't work at all.  Even the high-end 
> services that claim to offer guaranteed bandwidth apparently 
> do not live up to their claims.  We tried running G.729, 
> which should only need about 32-40k over a link that claimed 
> to guarantee 64k, and the best we got was broken sound.
> 

Hi,

You need to do 2 things...:
1, install bandwidth shaping, vlan, tos/qos in order to guarantee the
priority to VoIP data
2, check the TX power if it is the uplink that is failing.
3, check your QSPKBER, and both corrected and uncorrected error rates, as
see if there is not some other evil hapenning, that udp doesn't deal with
like tcp does.

I use low cost vsat for VoIP data all the time, and it works fine.






> Bruce Komito
> High Sierra Networks, Inc.
> www.servers-r-us.com
> (775) 236-5815
> 
> 
> On Wed, 11 May 2005, Yiannis Costopoulos wrote:
> 
> > 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 VoIP?
> >
> > Thanks,
> > Yiannis.
> >
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