[asterisk-users] Networking Concept

[Ivan Stepaniuk]

B.Masoud @ SH wrote:
> Assume I have a Main Asterisk Server located in UK, and another box that
> have PSTN interfaces located in China, now the purpose is to FW calls
> through PSTN.
>
> Assuming I have a client who is calling from Japan to my main switch in UK
> and he is calling China, (japan have latency around 500ms to UK and 100ms to
> China),  how asterisk will deal with this call?? Will his latency be
> JAPN->UK + UK->China (around 1000ms !) or only from Japan to China???
>   
In the case of the SIP protocol, the audio (RTP) traffic can be 
re-routed on the fly from A(jp) to C(ch), reducing the audio latency, 
(and sometimes increasing your headaches). This is calling re-INVITE, 
and can be turned on on asterisk. For other protocols there are similar 
features.

I think your latency figures are a little bit exaggerated if you speak 
about the network latency. I am in Spain and my latency to China at my 
home ADSL is arround 80ms for mainland. 250ms to Tokio tough.
Regards

--
Iván Stepaniuk
Alba Fotónica S.L.
www.albafotonica.com