. Conversations stay on track with Poly HD Voice. Eliminate distracting background noise at the source with exclusive award-winning Poly Acoustic Fence technology. Easy for IT to manage with robust provisioning and management of telephony deployment and support. Deploy the CCX 400 with a simple dial pad (no voicemail) with Microsoft Teams CommonArea Phone (CAP) license. Or deploy the CCX 400 as an entry level touch screen phone for Open SIP, Skype for Business, or the full native Microsoft Teams experience