Sorry if this is a silly question, but I'm modelling a station building loosely based on York, c. 1920s-40s. Looking at an image I found of the architectural plans, there's a telegraph room/office. What would this kind of room have actually contained by the early 20th C? Would it have been a public facility for passengers to make calls or send messages, or a private railway office/switchboard for managing communications around the railway? It's not a massive space, but it is fairly visible from the platform so a bit of advice on what to put inside it would be much appreciated. General suggestions are fine - I'm not looking for slavish accuracy to what was actually in York.
Thanks!