The Gigaset Comfort 500 A Trio (CH version) can be connected and operated directly to the analogue telephone connection of the Swisscom Internet Box 2, 3 or 4. It is an analogue landline telephone that is not connected to the Swisscom Box via DECT, but via the classic telephone connection (RJ11). This means that it can be used directly on the analogue connection of the Swisscom Box, but without the extended DECT functions of the Box. The basic telephone functions are guaranteed.