A horrible thought has just struck the US Federal Bureau of Investigation and it has got it waking up in a cold sweat and trembling night after night: last week, for example, FBI Director William Sessions sent to the House of Representatives a piece of draft legislation that would require telephone companies and equipment manufacturers to adapt their equipment, rewriting their existing software and modifying existing hardware to get around the problem, all this effort to be paid for by customers, Microbytes reports: the problem that has got the G-Mens’ G-strings in a twist? With Integrated Services Digital Network, digital multiplexing means that they can’t tap in and listen in to individual conversations.