Hello Aymane,
welcome to the Polycom Community.
The community's VoIP FAQ contains this post here:
Jul 17, 2014 Question:Can I deploy Polycom® SoundStation® IP Conference Phones with Cisco® Unified Communications Manager (CUCM)?
Resolution: Please check => here <=
The above explains how you get the phone part of the CX5500 integrated with a CUCM using examples from a Polycom SoundStation phone.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
Polycom Global Services
----------------
The title Polycom Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. My official "day" Job is 3rd Level support at Poly but I am unable to provide official support via the community.
----------------
Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
