BERLIN: Military headquarters war-time warnings, reading `remember the telephone is not a secure means of communication`, are still to be seen occasionally in some of the Allied control offices in Berlin.

... Wireless transmissions are certainly monitored by unauthorised agencies. There is at least one well authenticated case on record of the publication here with comment, on a Thursday, of an American news dispatch sent by wireless to an American weekly in which it could not possibly have appeared until Saturday two days later. It was published in Berlin in a Russian-licensed newspaper.

Within recent weeks, it is asserted, several Germans arrested and interrogated in the Soviet sector or in Potsdam have had played back to them, by Soviet secret police interrogators, recordings of telephone conversations they had made within one of the western sectors. So packed with explosive possibilities is the whole subject of wiretapping that, while many people in Berlin know of its ramifications, no Berlin newspaper has yet printed a hint of the practice. News agencies