Max. 20 handsets 1 DECT base Up to 8 simultaneous calls More DECT coverage is needed Up to 2 extra N670 Base stations Max. 20 handsets Up to 8 simultaneous calls No license is required, just update to software 2.38.0 or higher !!! Needed when: More DECT base stations and/or More DECT handsets and/or More simultaneous calls Up to 60 extra N670/N870 Base stations Up to 250 handsets Up to 60 simultaneous calls Software 2.38.0 or higher is needed Each N670 device needs an license S30852-H2714-X3 N670 UPGRADE TO N870 FEATURE LEVEL