SARI (Secondary Access Rights Identifier) printed on paper, unique identifier needed once per DECT installation, can be use for multiple sites within one installation
Different to IP Dect, Dect R4 requires no licensing. (On IP Office, the needed number of VCM channels is required however)
A base-station can be added and changed without any problem
To uniquely identify a single system (e.g. to generate a PARK code) one SARI certificate (Secondary Access Rights Identifier) is required once per DECT installation to identify the system. The SARI is printed on paper and must be ordered separately.
Generally, each system requires it‘s own SARI to e.g. avoid cross-usage of phones. While not recommended, for a single customer with several sites but non-overlapping base-stations, the same SARI certificate could be used.