AT&T SB67030 Administrator's Manual page 124

Synapse Administrator's Guide
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. Figure 119. Single-Zone Overhead Paging on FXS Port
In this configuration, you can specify a paging delay 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. See "[ATA] Single-Zone Overhead Paging Delay" on page 129.
System Configuration 124