DECT base stations use the DECT radio interface to synchronize themselves. Thus, the CAP standard is met and a best possible utilization of the air channels is ensured.

One base station in the system is defined as the synchronization (synch) master. It is recommended that Sync Master and DECT Master are installed on one station. This means that, based on this base station, all other base stations align their internal quartz oscillator, in order to work with the same frequency and drift. It does not mean, on the other hand, that all base stations must be in direct radio contact with the DECT master. A base station that is running in so-called slave mode can align itself with another base station, which is also running in slave mode.