Installation guide

Synapse Installation Guide Back to Contents
Installation 23
To install an OHP system, see “Connecting an Overhead Paging System (OHP)” on
page 45. There are three possible OHP configurations.
For OHP WebUI configuration, see “Overhead Paging Overview (ATA Required)”
and “Creating, Editing and Deleting Paging Zones” in the Synapse Administrator’s
Guide at
www.telephones.att.com/synapseguides.
Single-Zone Paging
Single-zone paging means that all speakers connected to the OHP system are activated
together (that is, they are in the same zone).
Single-Zone OHP equipment connected to the AUX OUT jack:
Use this configuration to connect single-zone paging equipment that uses a 3.5 mm
audio jack as input. For example, use this configuration if the OHP device is just an
amplified speaker. See Figure 26 on page 46 for connection details. Verify that the OHP
input levels are compatible with ATA level. See “Appendix B: Technical Specifications” on
page 144. Only single-zone paging is supported in this configuration.
Figure 5. Single-Zone Overhead Paging on AUX OUT Jack
Single-Zone OHP equipment connected to one of the FXS ports:
Use this configuration to connect paging equipment that interfaces through a telephone
line. Typically, any OHP that connects to an FXS port has some intelligence to go off and
on hook or otherwise send a signal back to the pager. These are generally controllers or
telephone interfaces with controls and settings.
In this configuration, you can specify a paging delay on the WebUI to compensate for the
fixed delay introduced by the OHP system. This delay ensures that the paging tone is
played simultaneously on both Desksets and on the OHP system.
Even if the OHP has no RJ-11 jack, it may still have a Tip/Ring interface, requiring
hard wiring. Whenever possible, try both the AUX OUT jack and an FXS port to
find the best configuration for your needs.