asterisk users - Sep 2009 - callfile to auto-answering extension

I have a SPA742, which can autoanswer a call

In the dialplan, I have this:
exten => 28,1,SIPAddHeader(Call-Info:\;answer-after=0)
exten => 28,2,dial(SIP/36)

Now I want some external event initiate a call to that phone and play a 
message.


I have been thinking of dialfiles, but I believe there is a problem:
Dialfiles call a channel, and then executes the dialplan.
I need to SIPAddHeader first, then make the call.
Or am I missing something obvious?

Can I, via a callfile, or command-line parameters to Asterisk start a 
"dialplan-script"?
eg asterisk -someflag "execute callalert"

then in dialplan
[callalert]
exten => s,1,SIPAddHeader(Call-Info:\;answer-after=0)
exten => s,2,dial(SIP/36)
exten => s,3,Playback(firealert)
exten => s,4,Hangup

Leif

2009/9/27 Leif Neland <leifn at neland.dk>:
>
> Can I, via a callfile, or command-line parameters to Asterisk start a
> "dialplan-script"?
> eg asterisk -someflag "execute callalert"
>
> then in dialplan
> [callalert]
> exten => s,1,SIPAddHeader(Call-Info:\;answer-after=0)
> exten => s,2,dial(SIP/36)
> exten => s,3,Playback(firealert)
> exten => s,4,Hangup
>
  ...sure, use Local channels.
 You can use Local/<ext>@<context> as the originating channel in
 a call file or AMI/CLI originate command.
--
  exvito