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Re: voip network hopping
From: Andrew Latham <lathama () gmail com>
Date: Fri, 10 Aug 2012 19:48:29 -0400

On Fri, Aug 10, 2012 at 7:45 PM, shawn wilson <ag4ve.us () gmail com> wrote:
On Fri, Aug 10, 2012 at 3:28 PM, Andrew Latham <lathama () gmail com> wrote:
On Fri, Aug 10, 2012 at 3:18 PM, shawn wilson <ag4ve.us () gmail com> wrote:
i'm curious if there is any spec in the voip protocol suite that
allows one to maintain a call while changing networks?

what i want to do is setup a softphone on an android phone. however,
this won't work very well if i can't switch from wifi -> 3g -> wifi (i
doubt wifi -> wifi is possible because of hardware limitations). my
alternative is to get asterisk to put the call on hold and play an
automated message if a reconnection (and unhold) takes >1 second. i
would expect that ip telephony would allow for some type of hopping
though, i just don't know what to google for?

This functionality can be done in many ways.  This is demonstrated in
the Asterisk SCF project during a demo, check youtube.


so, i see they made the asterisk server fail over by unplugging a node
and that's cool but not what i need. what i want is a way to keep a
connection with an asterisk server (or any other preferably free voip
server) when one path fails. this wouldn't be an issue if i could
garante a sip gateway at each ap (wifi or 3g).

... or did i miss something?


You missed everything

https://wiki.asterisk.org/wiki/display/TOP/Hello+World+-+Asterisk+SCF+Style


-- 
~ Andrew "lathama" Latham lathama () gmail com http://lathama.net ~


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