There are others who would disagree, but, my advice would be to remove the VPN,
and run an IAX trunk between your
home machine and the freepbx. You can enable IAX encryption if confidentiality
is an issue.
If you possibly can, enable trunking on the IAX interface, this will nearly
halve the bandwidth you need between the 2 servers.
IAX trunking however needs a zaptel (aka dahdi) timing source which might not
be available on your VPS.
A rough calculation shows you _should_ be ok with 8 channels of 729 even
without IAX trunking.
On 6 Sep 2010, at 09:06, sampath jayashantha wrote:
> Hi all,
>
> May be this question shouldn't ask hear. But I think you guys can give me a
> clue. Because im fighting with this from long time.
>
> My setup ;
>
> I have a asterisk server + freepbx running on VPS where hosted with burstnet.
> My partner send the call to this server thru sip trunk with g729 codec. Also
> i have another astersk now server located at my home. This home located
> server connected to internet via ADSL link {dynamic IP} ( download = 2Mbps &
> upload = 512 Kbps). I connected this two servers using a sip trunk. This sip
> trunk is connected via hamachi VPN. Home server have a 8port FXO card which
> is connected to PSTN network.
>
> My partners call come to vps server and then routed to home server and
> terminate to pstn network.
>
> Problem;
> My problem is i cant maintain a qualiti call from my vps server to homer
> server. Im using g729 licene codecs. Sometimes voice breaking. sometimes
> sound is low. sometimes no issue. still im trying to figure out what is the
> problem.
>
> Normally maximum number of call at a time is 3.
>
> I testest OPEN VPN and HAMACHI. What is the best VPN forVOIP ?
>
> Testes codecs ; G729, g711, gsm What is suit for ADSL ?
>
> Im doing testing testing and testing to achive good voice quality. Still im
> failed.
>
> Please tell me whats the best configuration to achive good sound quality over
> ADSL link. I saw ILBC is good for ADSL than G729. Is it true ?
>
> Im wondering skype works really fine when i use the same adsl link. But
> sometimes one sip calls also not giving me good quality.
>
> Please advice.
>
> --
> ..........................................................................................
>
> There is always some one who know more Than us out there.
>
> Wê Lïvê †ð §hårê : Wê Lðvê †ð §hårê
>
>
>
> SAM
> --
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Tim Panton - Web/VoIP consultant and implementor
www.westhawk.co.uk
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