The new CyberData SIP-enabled Paging Amplifier provides an easy method for implementing an IP-based overhead paging system for both new and legacy installations. Now with up to 9 user-stored messages, the Amplifier provides direct drive of up two 8 Ohm horn speakers. The interface is compatible with most SIP-based IP PBX servers that comply with the SIP RFC 3261. For non-SIP environments, the Paging Amplifier can be configured to listen to multicast address and port number combinations to form paging zones.