Our company is interested to import or to manufacture 
in cooperation with other manufacturer a telephone 
barrier inside in telephone socket.
Dimensions of European sockets are typical 8x8 cm for 
external plastic enclosure with a diameter hole 6 cm for 
the part for inside the wall (flush type near to shape of 
electric wall switch).
This product must programized very easily from the 
telephone hand set with tones using some different scenarios 
of use, such as to permit only some tel. Numbers to dial 
or some specific numbers to be berried.
This product must be in compliance with standards/ETSI. 
It must have two outputs female holes.
If your company have experience in this area and you are 
interested to produce barriers like the above using 
microcontroller please contact with our company