Cisco TCL Script to Selective Incoming Collect Calls

Hi there! I need to develop a TCL Script to block selective incoming collect calls, ie, only some extensions would accept such calls. In Brazil, Collect Calls are identified with a specific subscriber category (II-8) in E1 R2 line. I need to create a script that identifies this category, and send the call to predefined numbers or block those that are not. I believe it's possible, I learned that a partner company of Cisco developed this script. However, they didn't provide for us. A customer wants only a few people to receive collect calls. Today they has this functionality in Ericson MD110, and want the same for Cisco. A quick overview of the scenario is as follows: two VG's, each VG have 5 or 6 E1 interface, and these E1 have both ISDN-PRI and R2-MFC signs. For ISDN, I know that blocking is done in the carrier, and R2 through the Double-answer command. But both block all calls. What the customer wants, is the selective blockade. I saw in some forums, saying that I can use the parameters "set dest [InfoTag get leg_dnis]" and "leg setup $ dest callInfo leg_incoming." However, I have no expertise to do the script. Debug and configuration files attached were used by this partner that could solve this case using the TCL script. If you need further information, please inform me. Thanks in advance.