Maximum number of parallel calls:

Int call = 3

PSTN call = 1

VoIP call = 2

VoIPcall + PSTN call = 3 (2 VoIP + 1 PSTN)


VoIP call = external call via SIP account or Gigaset.net

PSTN call = external call via PSTN

Int call = internal call between two handsets 

Max. 6 handsets can be registered