systems have the capability to concurrently send a multicast audio stream and
text messages that can be delivered to not only paging speakers and IP tele-
phones but also PCs and non-VoIP telephones.
Authorized users can create paging groups which are similar to the legacy
paging zones, but with much more functionality, thus allowing users to select
particular end devices for the group. Users can control broadcasts from a
PC or a web browser on an IP phone and send a live, recorded, or scheduled
broadcast to one or more paging groups.
The paging system uses IP-addressable speakers with the average speaker
utilizing power over Ethernet (POE) thus eliminating the need for local power.
Paging horns, which require about 20 watts, will need POE Plus. All speakers
can be centrally controlled and managed via the network.
Some manufacturers of IP paging systems have integrated their products
into contact closure devices, generally associated with an access control system
to monitor which doors are open or closed. The contact closure at a door is
integrated with the paging system so that an open contact or open door can
trigger a page.
112 Smart Building Systems for Architects, Owners, and Builders