| Call Feature | OpenScape Voice | OpenScape Office | HiPath 3000 | HiPath 4000 | 
| outgoing/incoming calls |   |   |   |   | 
| Calling Line Identity Presentation (CLIP) |   |   |   |   | 
| Calling Name Presentation (CNIP) |   |   | -- |   | 
| Calling Name Identity Restriction (CNIR) |   | -- | -- |  via activation on the H4K | 
| hold – including music on hold while a caller is waiting |   |   |   |   | 
| consult |   |   |   |   | 
| toggle |   |   |   |   | 
| attended/unattended transfer |   |   |   |   | 
| 3-party conference |   |   |   |   | 
| Do not Disturb (DND) |   |   |  until now wrong message from H3K "Call Failed", instead of "User Busy" |   | 
| Distinctive Ringing (internal/external calls) - SIP based |   |   | -- | -- | 
| Message Waiting Indications for Voice Mails |   |   |   |   | 
| Group Calls |   |   |  Ringing groups (not MULAP) |  ONS- Parallel Ringing | 
| Call forwardings (busy/no reply/unconditional) station controlled |   |   | -- |   | 
| Attended / unattended transfer / blind transfer |   |   |  no blind transfer |  no blind transfer | 
| 2nd line / Call Waiting |   |   |   |   | 
| 3rd party call control |   |   | -- | -- | 
| Call Pickup Group |   | -- | -- | -- | 
| Call completion |   | -- | -- | -- | 
| ringer tone mute by incoming calls |   |   |   |   | 
| call reject |   |   |   |   | 
| time and date display at idle screen |   |   |   |   | 
| internal/external call ringer differentiation (device based) |   |   |   |   | 
| missed call list for incoming calls on a free Gigaset, including MWI signaling |   |   |   |   | 
| received call list |   |   |   |   | 
| DTMF transmission (RFC 2833 based) |   |   |   |   | 
| LDAP Access via handset |   |  via LDAP is access to the OpenScape directory service possible |  with OpenScape Office HX; via LDAP is access to the directory service possible |   | 
| SIP via TCP |   | not recommended | -- |   | 
| Featurecodes including * and # |   | -- | -- | some features only |