flexible intercom system - a mobile communication system

5-44 — elektor may 1980 flexible intercom system F1 "i1 ra P. Deckers Certain requirements must be met if an intercom system is to be fully flexible and efficient.It is essential that any station can call any other without the need for a master station. The number of inter- connecting wires should be as few as possible, conversations between any two stations should remain private and the standby current drain needs to be low. It would be useful if the system could also operate as a babyphone without blocking the line. The intercom described here complies with all of these requirements while being flexible with regard to station location. 1I[Eii_A!Ii[ii1 a mobile communication system Number 98 in the Elektor Summer Circuits (1979) issue reached a respect- able twelfth position in our recent competition, reason enough for us to look at the circuit in greater detail. It achieveseverything that is required of an intercom system and consequently remains unchanged. (A minor error did ...