When connecting MEWS with a PBX, the phone in the physical room is defined as a Space, or resource, in MEWS.

The name of the Space is the actual phone extension number, often the same as the room number.

As only one resource can be associated with a Reservation, we run into a problem when a room/suite is equipped with more than one phone, not uncommon in "high class" hotels. Each of these phones (=MEWS resources) needs somehow to be associated with the same Reservation.