Open Communications Principles and Best Practices 24/09/2010, page 11
¾ Do Not Disturb Event
¾ Diverted Event
Î Services on the OpenStage device:
¾ Make Call
¾ Answer Call
¾ Hold Call
¾ Retrieve Call
¾ Clear Connection
¾ Consultation Call
¾ Generate Digits
¾ Get Volume
¾ Set Volume
¾ Get Mute
¾ Set Mute
Î Events Generated by OpenStage:
¾ OpenStage does not generate CSTA Events.
With these services a SIP server can easily control basic OpenStage functions. For futher in-
formation please have a look at:
http://wiki.siemens-
enterprise.com/images/e/e7/white_paper_uaCSTA_Public_version_2010803.pdf
SIP is a great protocol for call processing. However, in some use cases, additional and up-to-
date information about a caller might prove to be very useful. Among the possibilities are:
¾ Add caller information from an external database
¾ Update caller information during call transfer
¾ Add hunt group information for incoming calls
¾ Enhance Executive/Assistant features with additional information
OpenStage supports RFC 3325 [7]. A SIP server can change the OpenStage display informa-
tion using SIP INVITE or UPDATE requests or any SIP response code.
Especially the P-Asserted-Identity Header can be used to carry additional information to the
phone user.