Mitnick showed a way but it's pretty complex: http://voipsa.org/blog/2008/07/23/asterisk-hack-to-show-blocked-caller-id-points-to-larger-trust-issues-with-sip/

Mitnick showed a way but it's pretty complex: http://voipsa.org/blog/2008/07/23/asterisk-hack-to-show-blocked-caller-id-points-to-larger-trust-issues-with-sip/ http://voipsa.org/blog/2008/07/23/asterisk-hack-to-show-bloc...