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Limitations
When OpenStage is configured as a keyset device with multiple lines then uaCSTA services can only be
applied to the prime line of the OpenStage device, secondary lines cannot be controlled using the
uaCSTA interface.
When invoking call related services (E.g. AnswerCall) and physical devices services (E.g.
SetMicrophoneMute) it is the OpenStage device which decides which call or speaker the service
request is applied to.
References
[1] TIA-811-A: Performance and Interoperability Requirements for Voice-over-IP (VoIP) Feature
Telephones
(http://www.tiaonline.org/standards/technology/voip/documents/TIA-811-A-final-for-
global.pdf)
[2] Session Initiation Protocol (SIP)-Specific Event Notification
[3] OpenStage Admin Guide
enterprise.com/images/1/1b/Administration_Manual_OpenStage_OpenScape_Voice.pdf)
[4] WPI Guide
(http://wiki.siemens-
enterprise.com/images/c/c7/OpenStage_Provisioning_Interface_Developer%27s_Guide.pdf)
Abbreviations
AoR
Address of Record
MAA
Multiple Address Appearance
MSA
Multiple Station Appearance
MLA
Multiple Line Appearance
SIP
Session Initiation Protocol
UA
User Agent
MWI
Message Waiting Indication
BLA
Bridged Line Appearance
SCA
Shared Call Appearance
Multi Address Appearance on OpenStage
(http://wiki.siemens-
(RFC
3261)
00.00.2007 I 22
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