Product manual

Operating the Model 26
98 025-9158L
system, and Model 6 status will be displayed on both. See Model 26 Fire Station
Dispatcher CAD Interface Specification (part number 027-0059) for a description of the
CAD protocol used between the CAD and the Model 26.
Multiple Model 26 Positions
If multiple dispatch positions are needed, up to 15 additional Model 26s (and their
associated expansion panels) can be chained to the primary Model 26 at the MULTIPLE
Model 26 port (refer to
Multiple Model 26 CHAIN OUT/IN Connectors on page 27).
Secondary Model 26s may be located within 1000 feet from the primary or from each
other. From the dispatcher’s point of view, each secondary Model 26 operates just like
the primary Model 26. There are some differences, however, even though they are
transparent in operation.
The primary Model 26 always has an address of “1” (refer to
Option Switch Settings on
page
23). It polls each of the secondary Model 26s, one at a time, to exchange data. The
primary Model 26 knows how many secondary Model 26s to poll from the Number of
Positions parameter. If this parameter is higher than the number of actual positions, the
Model 26 will attempt to poll units that are not there. This significantly slows down the
updating of the secondary units. If the Number of Positions parameter is lower than the
actual number of positions, some of the secondary units will not work.
Only the primary Model 26 transmits and receives data from the remote Model 6s.
Normally only the primary Model 26 can be connected to a CAD system or output data to
a Data Logger. See the
CAD Interface topic on page 97.
The secondary Model 26s perform the following functions:
• They send button-press information to the primary unit.
• They display station or unit status information received from the primary unit.
• They couple their handset audio to the primary Model 26, and to the Model 6s.