Setting up a PBX for Israel<->US communication

[Gilad Ben-Yossef]

Amos Shapira wrote:

> 2009/2/11 Gilad Ben-Yossef <gilad at codefidence.com>:
>   
>> I and others can go on. Asterisk works. I donno about the other stuff
>>     
>
> Thanks for the testimonial.
>
>   
>> (FreePBX etc.) but Asterisk is  prodction level system *If you know what you
>>     
>
> FreePBX claims to be a nice web gui for Asterisk, that's why I asked about it.
>
>   
>> are doing*. Being that you are an experienced Linux user that has no issue
>> editing rc files or RTFM I believe you've already got 95% of the reasons why
>> Asterisk installation fail covered. :-)
>>     
>
> Thanks for the reassurance. I've just ordered a vpslink Xen guest but
> the ssh latency from my home is very slow (I'm actually connected
> through a pretty good ISP). I'll try it from work tomorrow.
>
> Is 200ms ping time too much for SIP, or is it irrelevant.
>   
Very relevant. Callers usually notice roundtrip voice delays of 250ms or 
more.The recommendation for VoIP is a one way delay of less then 150ms. 
Anything more will become very noticeable in conversation and in real 
life 150ms is too high as well since jitter before induce around 10ms 
addtional latency.

In your case, 200ms round trip time, assuming a symmetric distribution, 
of delay (but mind you that the internet isn't really symmetrical...) is 
100ms one way delay so this is not excellent but not really bad either. 
In theory, at least, you shouldn't be able to notice this delay in 
conversation.

Gilad

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Gilad Ben-Yossef 
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