Abstract: A PABX switching network adapted to provide an interactive communication service to hotel guests comprises guest extension lines (4) each serving a telephone apparatus (3) located in individual guest rooms (2). The PABX system (1) is capable of interrogating a property management system (7) identifying the status of each guest room, and to couple a calling telephone apparatus (3) to an interactive call answering system (9) in order to provide a variety of call answering services to a hotel guest, depending upon the status of the guest room as indicated by the property management system (7). Each telephone station (3) incorporates a unique identify signal capable of being interrogated by the PABX (1) in order to enable information from the property management system (7) to be coordinated to the individual hotel guest rooms.