Paging System Accessories
Zetron makes equipment that enhances the radio network of paging operators by controlling the communications among
different radio sites.
Model 33 Paging Network Controller
The Model 33 is a remote transmitter controller which connects directly to paging encoders and terminals such as the Zetron
Models 15, 32, or 64. The Model 33 can be used with paging terminals that do not have built-in PURC remote control. It can
control the transmitter(s) via a wireline, microwave, or RF link.
Model 55B Page Buffer
The Model 55B is a high fidelity “simplex repeater” suitable for storing and forwarding analog and digital pages. By storing
pages received from a terminal for later transmission and allowing remote control transmitters on shared channels, the Model 55B
eliminates the need for costly zone sequencing or simulcasting equipment. The Model 55B can monitor a COR input at the
transmitter site to prevent transmission of pages when the frequency is busy.
Model 55D Digital Repeater
The Model 55D is used to extend the range of a paging system by decoding and retransmitting pages. Connected to a
receiver/transmitter in the range of the main transmitter, the Digital Repeater decodes the incoming POCSAG page, error
corrects it, and stores the page in memory. When the channel is clear, it reconstitutes the page and retransmits it. Used for
extending the range of paging systems, the digital repeater can use the system ID feature to only respond to pages with the
correct System ID. Individual Zone Address Steering enables multiple Model 55Ds to extend the range over several units
in a sequence.
Model 66 Transmitter Control Panel
The Model 66 Transmitter Controller connects to a radio-paging transmitter and allows the transmitter to be remotely controlled
from a central paging terminal. The Model 66 recognizes the site address, selects the modulation mode (analog or digital), keys
up the transmitter, and transmits the audio or digital data. Multiple transmitters can be synchronized, dual-frequency transmitters
can be controlled, and four link “hops” are allowed. The Model 66 is FLEX 1600 bps and Motorola PURC compatible.
Model 68 Transmitter System Controller
The Model 68 interfaces directly with the radio channel output of a 2000 Series terminal to steer transmitter control signals
to up to 16 separate interfaces. This allows a combination of RF, wireline, and microwave links to be controlled from one
radio station card output. The Model 68 is ideal for controlling multiple transmitter sites and supporting zone sequencing operation.
(232 pages)
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