The Backstage calls are given by the Deputy Stage Manager during the show they tend to do this call 5 minutes before hand. e.g. if the show starts at 7pm the 1 hour call will be given at 5:55pm, half an hour 6:25pm and so on. “Beginners” is a call given to tell the cast that the show will start in 5 minutes and that they will be expected to come to the side of stage.
FOH stands for Front of House.
Pre-show checks are what the team conduct before the show which is shown within my pre-show checklist Backstage Calls