[asterisk-users] network config

[Jeff LaCoursiere]

Slightly OT?

A client has two offices in the Virgin Islands that MUST maintain data
connectivity, and there are no available "leased line" options to run
a P2P link between them.

To date, broadband Internet connections at both offices have been used
as the link, with a VPN tunnel, and phones in one location use the tunnel
(Sonicwall) to talk with asterisk at the other location.  Although this
functions well, it only takes an (unfortunately frequent) hiccup  to lose 
calls and/or severely impact quality.

The client has decided to get a second Internet connection at both sites, 
and use the Sonicwall or any other possible firewall to manage the tunnel 
over both links, such that the phones won't know what link is being 
traversed, or (hopefully) that a link has gone down.

So the first question is - has anyone attempted anything similar and made 
it work?

Do you lose an in progress call when the tunnel switches from one link to 
the other?

And finally - is there a device that will manage the tunnel such that a 
high water mark of latency will also cause the tunnel to switch to the 
other link, rather than actual packet loss?

Thanks for any tips,

j