AT&T PagePac Plus AmpliCenter - Manual (Page 30)

Telephone System Interface
The AmpliCenter, when used without a PagePac Plus Controller, connects
directly to your facility telephone system for paging. Figure
3-6 shows this
interconnection. Be sure the Telephone Mode Switch on the rear of the
AmpliCenter is set to the type of telephone system you have (see next
paragraph).
When used with a PagePac Plus Controller, the AmpliCenter receives its
telephone paging input from the controller. Figure 3-6 illustrates this
interface, as well.
The connection between the AmpliCenter and the page input interface has
four possible modes of operation to accommodate a variety of telephone
systems. They are as follows:
■
Dry loop, 600 ohms
■ Dry loop, Hi Z
■ Ground start
■ Loop start
Telephone Mode
Switch
1.
2.
3.
4.
1 2 3 4
DL DL GS LS
600 HI-Z
Dry Loop 600 Ohms, used for input from paging port of
PBX or from microphone
Dry Loop Hi Impedance, used to parallel many
AmpliCenter inputs without loading down the source
output.
Ground Start Trunk, for input direct from PBX
Loop Start Trunk, for input direct from PBX
Installing the Hardware 3-9