7100 is not requiring a 9 to access outside line. To recreate I factory defaulted 7100 and used the wizard to complete simple setup with single sip trunk. Then added a single vvx400 with formatted file system. The system setup/dial plan is set for 7d dialing and TAC 9 but calls initiated from the vvx400 with nxx-xxxx go through. What steps can I take to troubleshoot why calls are being allowed?