[asterisk-users] AAI2UUI - how?

[Christophorus Laube]

Hi list,

on my asterisk machine I have an E1 (Beronet with chan_misdn) board and 
sip clients connected. I am getting some AAI 
(application-to-application-information, enriched SIP header, similar to 
the SipAddHeader application) from a sip client during the BYE method. I 
want to give this AAI to my ISDN line as UUI (user-to-user-information) 
during ISDN Hangup. Doing that with the SipGetHeader application is not 
possible as this is only allowed on incoming SIP calls. Is there a 
possibility I can customize my cdr in a manner that logs this AAI and I 
can strip that in the hangup extensions from the cdr to set the 
MISDN_USERUSER variable and write UUI?
TIA and Regards, Christophorus