The cuckoo's egg in the phone "Operator255" if display and keyboard of a cordless phone uses for the announcement and service of his sensors / Aktoren which are headed over a 2 wire-bus.
As sensors contacts from the protection, machines, house technology serve freely of potential etc.
Aktoren head for achievement counter. With the cordless phone all registration texts can be stored away alphanumerically, be indicated as an announcement or be questioned any time as a time stamp.