Hi guys,
Well the problem is solved. When pragramming the isdn on the mitel 3300, there is an option you can check ENBLOC.
I check this option and it start working.
The point is that the system was sending the whole string "001#0031102411720" and the provider could only received max 15 digits.
When i check the option ENBLOC in the isdn protocol is start working.
gimitel