- 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