[Asterisk-Users] Multiple Asterisk servers sharing/propagating registry ?

[Steven Critchfield]

On Tue, 2003-12-09 at 15:06, Andrew Kohlsmith wrote:
> > I'd like to know if there is a way for multiple asterisk servers to
> > share a common SIP and/or IAX registry.
> 
> > The setup I imagine would be something like :
> > - several asterisk servers called sip1.isp.com, sip2.isp.com, ...
> > - a DNS alias sip.isp.com pointing to all the addresses (thus
> >   providing a round robin resolution on each server)
> > - each SIP client would register with sip.isp.com (thus ending on a
> >   random asterisk servers)
> > - but after that, all the servers would be "aware" of the
> >   registration. Thus any asterisk server would know how to route a
> >   call to SIP/<some registered user>
> 
> I would like to know how to do this as well, but for different reasons: 
> mobile users.  If I'm in the office my SIP phone registers with the local * 
> box, or at my house wiht my * box, and so on and so forth, so my extension 
> moves with me.  If I'm not anywhere near a * box the SIP registration 
> eventually dies and since there's no SIP registration it calls my cell 
> phone...  kind of like a universal extension type of thing.
> 
> I know I can dial all of them with one extension and whichever picks up 
> picks up but that seems a little ... hokey.  I can't think of a better way 
> to do it short of being able to propagate registrations across * boxes.

Sounds like a failover should be used.
Dial(Sip/inoffice)
Dial(IAX2/home_machine)
Dial(Zap/g2/${cellnumber})

If you are registered at the office, the first line completes the call.
If you are not there and/or the phone isn't registered, it dials out to
your home machine. If you aren't at home, or registered it fails over to
the cell phone.

Your just progressing through steps.
-- 
Steven Critchfield  <critch at basesys.com>