As I checked the Polycom IP soundstation support to register to Alcatel OXE PABX system in below link
Would you please check if there have any documentation to show the feature support list while connect IP sounstation to Alcatel OXE?
Since I found the Cisco CUCM also have those feature complience list which release from Polycom (please check in attachment).
welcome to the Polycom Community.
The community's VoIP FAQ contains this post here:
Oct 7, 2011 Question: Can I register or is my Polycom Phone compatible with a “XYZ” SIP Server?
Resolution: Please check => here <=
Above Link contains a follow up listing all the Polycom SoundStation IP Platform Compatibility including the Alcatel models with follow up links to the manufacturer.
The details for supported features should be requested from Alcatel.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Polycom Global Services
If official support is required please check how to phone or open a case here----------------