Hello yorkie727,
welcome to the Polycom Community.
The community's VoIP FAQ contains this post here:
Oct 7, 2011 Question: How can I check out the Registration Status of my Phone?
Resolution: Please check => here <=
Above explains how you can check the registration status of the phone.
It would be interesting if the unit is registered correctly. In order to receive an incoming call certain ports need to be open.
You may want to work with your network team on this.
Jan 19, 2012 Question: How to troubleshoot Polycom VoIP related Issues?
Resolution: Please check => here <=
Above explains how to utilize the phones logs and/or wireshark to troubleshoot such issues.
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
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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
