<p>Telecommunications exchange apparatus having an associative (i.e. contents-addressable) memory for use in retrieving certain items of control information. Thus, the memory may be used for: equipment number to directory number translation, and vice versa; determining the states of subscribers' lines and junctions; PABX line hunting; control of calls to and from party lines; control of special facilities (e.g. call transfer); and traffic analysis.</p>
