If there's not a guide to what numbers he could push leading to specific places (one that he could read anyway. Can he read things here the way he could on the Serena?) then he's going to try and guess a button combination based on those of the rooms that he can see around him, and try to reach someone at least semi-official. This may result him him waiting there with the receiver in hand while he works his way through a few combinations. Bear with him...

In the eventuality that one actually connects to someone, he's going to introduce himself as "Wayne Ingmoon of Waynehouse, where am I and is Warden Sextus present to tell me what's up because this is weird."