Quite a common form in various establishments and I have seen similar at the old High Marnham power station, during my working days It is very important to recall as much as possible about a telephoned 'bomb threat', the form will allow and help the receiver of the call to remember and record all the important details. One of the most important questions on my old employer's standard form was 'Any background noises heard during the call?' Very helpful in tying down the location of the caller.