[Asterisk-Users] Sip phones on the same extension?

[Tilghman Lesher]

On Wednesday 24 December 2003 13:06, Brian Buhrow wrote:
> 	Hello.  I'm a new Asterisk user, but I'm impressed with the
> flexibility and versatility of Asterisk, and am moving quickly to
> adopt it's main-line use in our company.  Hopefully, you'll be
> hearing more from me as the project moves forward.
> 	Right now, though, I have a question about SIP peer registration.
> Right now, for our SIP-based phone,s, we're using the Sip Express
> Router product, which accepts sip registration requests and lets us
> route calls to any of the phones which register with SER.  I am a
> semi-nomatic user, and can work at any of three different
> locations.  Right now, my phones all sign up with SER, and register
> with the same telephone number.  When someone dials that number,
> all three phones ring, and which ever one gets answered first, gets
> the call.
> 	When I tried to do this with Asterisk, sources from the cvs
> repository as of 12/18/2003, sip show peers only showed the most
> recent registration. This lead me to believe that if I dialed the
> number, only the most recently registered phone would ring.  I was
> able to work around the problem by defining an umbrella extension
> which rings all three phones at the same time, but I'd like to have
> a way of dynamically adding phones to a given extension without
> having to necessarily rewrite the extensions.conf file, and I'd
> like calls from these extensions to show up from the master
> extension that folks should use to reach me.  I imagine I could do
> something with pickup groups, but my understanding  is that it is
> not true that all phones in a pickup group will necessarily ring
> just because they're a member of a given pickup group.  The phones
> on this particular extension are many miles from each other, so one
> couldn't hear the other phone ring.
> 	Another work around is to put
> Asterisk behind SER, but this seems overly complicated, and I want
> to make sure that Asterisk doesn't do what I want before I pursue
> that path.
>
> Any suggestions on how to have multiple phones register with the
> same number in Asterisk?

In sip.conf:

[phone1]
type=peer
host=dynamic

[phone2]
type=peer
host=dynamic

[phone3]
type=peer
host=dynamic

in extensions.conf:

[default]
exten => 0,1,Dial(SIP/phone1&SIP/phone2&SIP/phone3,30,T)

-Tilghman