I just called the technician this morning and he connect remotely to my desktop to reconfigure the system. he still insist on dial block but he still couldn't make it work right. now all telephones can still make international call after 3 hours of configuration.

@dohart
we usually get lousy service out here because our office site is in the middle of the desert.

@pbxengineer6
your procedure seems to work, I can get dial tone after the dialing code+pin+internal dial tone+9.

something in the configuration allows all extension to call international call and I couldn't find where to disable it.

we will be having remote session this afternoon again and let's see what will happen.

Always expect the unexpected!!