SwyxWare is operated on several internal BRI or PRI connections of the existing, telecommunication system to be extended, depending on the capacity required. The classical telecommunication system must support the Euro-ISDN signaling protocol on these ports (or Q.Sig on an internal BRI ).

The telephones of the classical telecommunication system must allow a configurable, delayed call forwarding, which forwards the call after a specific period of time to another, internal number.

For practical purposes, the number range of the telecommunication system must be large enough that each subscriber of the classical telecommunication system can be assigned his own number for Voicemail. If there are not enough numbers available, the configuration of SwyxWare is somewhat more complicated.