asterisk users - Dec 2005 - Using SIP_HEADER() Function correctly

(oops, wrong account, let's try again, without the work email getting it
blocked)

Am I correct in my thought that if I was to issue:

Exten = 1234,1,VERBOSE(1|${SIP_HEADER(HEADERNAME)})

In the dialplan that asterisk would return the value of the HEADERNAME
field, if there was one attached to the invite?

I've been hunting around, but have found no working examples of this. 

Thanks

SKM

With some of the newer versions of Asterisk and AMP, many people have been
having problems getting the Linksys/Sipura SPA-3000 working properly. We
have just posted an all-new guide to getting the SPA-3000 up and running.

http://voipspeak.net/index.php?option=com_content&task=view&id=51&Itemid=28

-Kerry