The ZKR Comfort series provide a structure for voice communication platforms within the ZKR product family.The system is designed to provide high level of communication with patients and nurse services. It is also possible to integrate applications such as a room lightning, TV controlling from the handset as well as voice conversation between the Comfort series products and the Patient to Nurse. Voice recordings of conversations between patient and staff or staff and other staff are kept in the system. These audio recordings can be accessed when it is necessary. External phone calls can be calculated and invoiced to persons.