[asterisk-users] how to determine if a SIP extension has DNDonoroff

[Joshua Colp]

> 
> --- Steve Langstaff <steve.langstaff at citel.com> wrote:
> 
> > I don't know about the 1.4 source, but in 1.2 I
> > guess you would have to
> > add some more code to
> > 
> > handle_response_peerpoke()
> > 
> > to handle the case where you got a 486 response from
> > the peer.
> 
> ok thanks, so that just seems to confirm that Asterisk
> 1.2 DND's behavior can't be modified/customized
> without patching the source code. I might forward this
> issue to asterisk-devel.
> 

What do you mean modified/customized exactly?

If you mean can you know whether a device has DND enabled or not before sending a call then no, even an OPTIONS packet won't tell you that. You send a call, they reject (and sometimes they even use a response code that doesn't indicate it's DND). Same goes for call forwarding. You send a call, they reject saying "go here instead".

Joshua Colp
Software Developer
Digium, Inc.