- Easy To Install - Multiple Simultaneous Pages - Live or Recorded Messages - 65,000 Speakers, Expandable To 256 IP Paging Zones - Easily Connect Loudspeaker System To Existing Computer Networks - Compatible With Cisco, Nortel, Avaya, Iwatsu And Most IP Telephone Systems - Supports IP And Analog Amplified Speakers - Supports IP Talkback Speakers - Supports Legacy Paging Systems - Synchronized Clock Compatibility - PoE (802.3af) Or Local Power - SIP And Multicast - Feedback Eliminator - DHCP