Disable Toll-Fraud Prevention Feature on Cisco IOS 15

Recently helped sibling company to replace new router and spent 1 day to troubleshoot VoIP problem.

after using "debug voice cccapi" we got this log...

%VOICE_IEC-3-GW: Application Framework Core: Internal Error (Toll fraud call rejected): 
IEC=1.1.228.3.31.0 on callID 3 GUID=F146D6B0539C11DF800CA596C4C2D7EF 
000183: *Apr 30 14:38:57.251: //3/F146D6B0800C/CCAPI/ccCallSetContext: 
   Context=0x49EC9978 
000184: *Apr 30 14:38:57.251: //3/F146D6B0800C/CCAPI/cc_process_call_setup_ind: 
   >>>>CCAPI handed cid 3 with tag 1002 to app "_ManagedAppProcess_TOLLFRAUD_APP" 
000185: *Apr 30 14:38:57.251: //3/F146D6B0800C/CCAPI/ccCallDisconnect: 
   Cause Value=21, Tag=0x0, Call Entry(Previous Disconnect Cause=0, Disconnect Cause=0)

http://www.cisco.com/en/US/tech/tk652/tk90/technologies_tech_note09186a0080b3e123.shtml#t3

Finally found out all call are blocked by new Toll-Fraud Prevention Feature on new IOS 15...
And it is the command to disable it.

voice service voip
 no ip address trusted authenticate