One Ethernet cable. That's your whole install. The CyberData VoIP SIP/Multicast Ceiling Mount Speaker plugs into your existing LAN and starts paging. SIP and multicast simultaneously — receive pages from Poly phones, any standard multicast source, or both at once. Ten paging groups. Paging prioritisation so an emergency announcement cuts through background audio. TLS 1.2 with mutual authentication and SRTP for cloud or on-prem deployments. Autoprovisioning over HTTP, HTTPS, or TFTP. VLAN tagging supported