Calling Party Tap: In the existing implementation, calling party tap is based on the SUBSCRIBER: DN1 always. So, the same method will be applied when SIP client user dials AOR. The BTS 10200 will make the TAP decision based on the DN1. The information sent to DF server would have following subscriber identity related fields.
Calling Number: DN1
Called Number: NULL
User Input: dialed AOR
When Calling party does not have SUBSCRIBER: DN1, call cannot be tapped.
Called Party Tap: Called party tap should be strictly based on the dialed-string information. Since the CALEA wiretap table contains only DIGITs information, there will be no tapping on the called party for AOR dialed call.
