Below is a list with supported N720 Handsets.

FeatureGigaset PRO handsetGigaset Retail handsets (GAP+)3th Party (GAP) handsets
Incoming calls(tick)(tick)(question)
Outgoing calls(tick)(tick)(question)
Call transfer(tick)(tick)(question)
CLIP information(tick)(tick)(question)
Anonymous call(tick)(minus)(minus)
Call divert(tick)(minus)(minus)
Call waiting(tick)(minus)(minus)
Message waiting(tick)(minus)(minus)
Call lists(tick)(minus)(minus)
PBX Manager*(tick)(minus)(minus)
Central Phonebooks(tick)(minus)(minus)
Info Center(tick)(minus)(minus)
Handover(tick)No support guaranteedNo support guaranteed
Roaming(tick)No support guaranteedNo support guaranteed
Gigaset SupportFull supportOnly warranty supportNo support

 

* PBX Manager only supported with Gigaset T300/T500