Features and Configuration of SIP Devices

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OpenScape Business provides its extended, rich feature set with OpenStage HFA phones. Many features are also available for standard SIP phones. The features which have been released for OpenStage SIP phones are:

  • CLIP (Display the call number or name from caller)
  • Consultation (Set the call on hold, phone goes into dial state)
  • Call transfer (Call transfer attended, semi-attended and blind)
  • Call Forwarding (Call Forwarding Unconditional (CFU), Call Forwarding on Busy (CFB) and Call Forwarding on No Response (CFNR) are configurable at SIP phones)
  • Conference (Three-party conference located on the phone, passive member of system conferences)
  • MWI (Notification if call or message is recorded)
  • DND (Call will be rejected)
  • Call waiting (A second call is signaled)
  • Group and Basic / Executive MULAP calls (No group call numbers are displayed, only original caller number)
  • DTMF (Manage voicemail boxes or auto attendant)
  • Distinctive ringing (Different ringtones for internal, external and recall)
  • 3rd-party call control (Useable with 3PCC applications e.g. myPortal or Outlook and OpenScape Business controlled conference, available with V1 Step 2)
  • Call deflect (Forward ringing call to another destination)
  • Call reject
  • Groups: The system Feature "group call pickup" activated by service code is supported from OpenScape Business V1R3.


  • Some other System features that are operated via service codes e.g. door opener, speed dialing, will be supported from OpenScape Business V1R3.1.
  • No MULAP keys are supported for SIP phones. 'Call completed elsewhere' for caller list is supported with the latest OpenStage SIP and HiPath Cordeless IP versions.
  • SIP terminals cannot be used for OpenScape Business contact center agent.
  • An internal SIP phone will hear MoH only, no ringtone, when it is supervised transferred by a second internal party.
  • Device specific features, which are not supported by OpenScape Business, shall be disabled in the device as described in the SIP device configuration guide.
  • DLI is used used for SW-Updates of OpenStage phones, settings of additional parameters like "Activate second LAN interface", and providing some additional SIP parameters.

Instructions how to administrate OpenScape Business for SIP devices are the same as for OpenScape Office and can be found here :
pdf.png  OSBiz SIP Endpoint Configuration

Please note that only the OpenStage SIP phones, OpenScape Desk Phone IP 35G, OpenScape Desk Phone IP 55G and HiPath Cordeless IP devices are officially released and supported.
The other devices below have passed a connectivity test but may not support all possible OpenScape Business features.

Device configuration hints and differences in the feature set can be found in the following documents.

SIP Desk Phones

SIP Mobile Devices

SIP Soft Clients

SIP Gateways