[asterisk-biz] Global VoIP Calls?

[Alistair Cunningham]

Gavin,

Do you want to bring down latency for calls between remote offices (e.g. 
Edinburgh to Singapore), or just within an office or nearby offices 
(e.g. Tokyo to Tokyo or Tokyo to Seoul)? If the former, you're 
completely at the mercy of the network and there's very little you can 
do about it.

If the latter, then a distributed system is what you want. You can roll 
your own using multiple Asterisks, or you can use an off-the-shelf 
product such as Enswitch. Enswitch's regions feature allows you 
centrally manage all users from a single database, while having multiple 
sets of telephony machines in each region. Each user can then choose 
which region their telephone is in, and the registrar and SIP proxy will 
deliver the calls to the best call routing machines for that region. RTP 
media then only goes through the call routing machines. If the call 
routing machines in one region go off-line (perhaps due to network 
outage), calls will failover to the next best set of machines, and so 
on, as defined by the system owner. More details are at:

http://integrics.com/products/enswitch/guides/latest/en/system/architecture/

and:

http://integrics.com/products/enswitch/guides/latest/en/system/regions/

Alistair Cunningham
+1 888 468 3111
+44 20 799 39 799
http://integrics.com/


Gavin Henry wrote:
> Dear All,
> 
> What solutions are available for making VoIP calls whilst bringing
> latency down between offices at:
> 
> * Edinburgh
> * Kuala Lumpur
> * Singapore
> * Tokyo
> * Seoul
> * Beijing
> * San Francisco
> 
> Some of the Asia offices are > 300ms some > 200ms.
> 
> Anyone know companies in between the UK company HQ and US/Asia that
> forward calls?
> 
> Any advice greatly apreciated.
> 
> Thanks.
> 
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