 Leaky PBX is the name given to the practice of using a local PBX to leak calls from country A into the network in country B, disguising them as local calls.It receives the calls on its PBX in country A, sends them over a satellite link, dedicated telephone circuit or data link to country B, and sends the calls out into the public telephone network of country B through its PBX there.With a small satellite dish on the roofs of its offices in country A and B and a little capacity on a transponder, a company can become a small-scale international carrier.