voip network hopping

shawn wilson ag4ve.us at gmail.com
Fri Aug 10 23:45:37 UTC 2012

On Fri, Aug 10, 2012 at 3:28 PM, Andrew Latham <lathama at gmail.com> wrote:
> On Fri, Aug 10, 2012 at 3:18 PM, shawn wilson <ag4ve.us at 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?

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