https://www.cyberdata.net/
The Syn-Apps enabled VoIP V2 Ceiling Speaker is for use with the Syn-Apps SA-Announce notification system. SA-Announce provides text and audio-based paging and mass notification services in real-time or scheduled intervals.
The CyberData V3 VoIP Paging Server enables users through a single SIP phone extension, to access multiple zones for paging in a VoIP network and to connect to legacy analog overhead paging systems.