Instruction manual

Installation
74 025-9416
Model 640 with
PURC®-compatible
station output
PURC® Paging
Transmitter
RING
TIP
Tx Audio Hi
Tx Audio Lo
PURC® tone signal
leads via phone line
RING
TIP
Tone Audio Hi
Tone Audio Lo
Zetron
Model 66
PSTN
Figure 38. Remote Transmitter Connected by way of Leased Telco Line
Combined Local and Remote Transmitters
Many applications require several transmitters to cover a specified region. Often times a single
transmitter is located at the main paging site with the Model 640 and one or more transmitters
are located in remote areas to increase the coverage area. The remote transmitters can be linked
to the paging terminal by way of either or both of the methods described earlier.
Figure 39 illustrates the basic connections between the Model 640 radio station output and both a
local paging transmitter and a link transmitter. In this example, the Model 640 sends pages to
three coverage zones - one local and two remote.