Setting up a PBX for Israel<->US communication

Setting up a PBX for Israel<->US communication

Gilad Ben-Yossef gilad at codefidence.com
Wed Feb 11 13:41:41 IST 2009


Gilad Ben-Yossef wrote:

>> 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.
>
Forgot to add - here is a great resournce for all things VoIP & QoS: 
http://www.voip-info.org/wiki-QoS

Gilad



-- 
Gilad Ben-Yossef 
Chief Coffee Drinker

Codefidence Ltd.
The code is free, your time isn't.(TM)

Web:    http://codefidence.com
Email:  gilad at codefidence.com
Office: +972-8-9316883 ext. 201
Fax:    +972-8-9316885
Mobile: +972-52-8260388

	The Doctor: Don't worry, Reinette, just a nightmare. 
	Everyone has nightmares. Even monsters from under the 
	bed have nightmares, don't you, monster?
	Reinette: What do monsters have nightmares about?
	The Doctor: Me! 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.cs.huji.ac.il/pipermail/linux-il/attachments/20090211/900b0803/attachment.html>


More information about the Linux-il mailing list