See below for a list with supported features when using the Gigaset IP devices behind an Asterisk PBX system.
All tests were performed by the Gigaset pro support team.

Version of the asterisk kernel: V1.6, V1.8

PRO Interop FeaturesDE310/410DE700/900N510 N720
Software release:V02.00.01V02.00.04V042V032
Basic CallYesYesYesYes
Calling line (CLIP)YesYesYesYes
Connected line (COLP)YesYesYesYes
Dial planYesYesYesYes
MWIYesYesYesYes
Call list/history (local)YesYesYesYes
Voice mail deposit/retriev.YesYesYesYes
Call waitingYesYesYesYes
Call Hold/toggleYesYesYesYes
Music on HoldYesYesYesYes
Call forward (CFU)YesYesYesYes
Call forward (CFNR)YesYesYesYes
Call forward (CFB)YesYesYesYes
DoNotDisturb (DND)YesYesYesNo
Call Transfer attendedYesYesYesYes
Call Transfer unattendedYesYesYesYes
DTMFYesYesYesYes
Conference 3ptyYesYesYesNo
Simult. ringing/call forkingYesYesYesYes
BLF Busy/idle indicationYesYesNoNo
Group pickupYesYesYesYes
Time/Date from PBXYesYesYesYes
Anonymous CallYesYes  
Session AuditYesYesYesYes
Session TimerYesYesYesYes
Remote RingbackYesYesYesYes
TCPYesYesYesYes
Phonebook localYesYesYesYes
Phonebook LDAPYesYesYesYes
AutoprovisioningYesYesYesYes