For example a fast red flash means there is an error.
Without knowing the history of the Installation it is hard to determine why the unit may be in this state.
Have you attempted an factory reset yet?
Please contact Spectralink support => here <= if you require further assistance
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Polycom Global Services
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