[asterisk-users] Which device auto-registered an extension?

[Barry Miller]

Hi all,

In sip.conf:
  [general]
  regcontext = autoreg

  [devabc]
  regexten = 543

creates "exten=> 543,1,Noop(devabc)" in context autoreg when devabc
registers.  But I can't use "exten=> _5XX,2,Dial(SIP/${EXTEN})" in the
dialplan, because there's no device SIP/543.  Now I know I can add a line
like "exten=> 543,2,Dial(SIP/devabc)" for each and every device that uses
regexten, but it would be a lot cleaner to be able to use something like
Dial(SIP/${WHAT_GOES_HERE?}) instead.

So is there a way for the dialplan to determine which device caused SIP to
auto-register an extension?

-- 
Barry