During the thirties of the 20th century, the CTTM achieved a great expansion of its services not only to important cities and regions of the Republic, but also abroad. To do this, it made purchases and transfers of various telephone plants that led it to then manage more than 35 local plants, offering the service to over two million people. His philosophy was to convince the client that his service, in addition to helping to resolve commercial issues, also strengthened family and social relationships, always weighing up the speed in time, the low cost and above all the pleasure of listening to a loved one.