Product manual

Operating the Model 26
90 025-9158L
PA ON
This command turns on a station PA for announcements from the dispatcher. Once the
Model 26 receives the PA ON status from the Model 6, the dispatcher may key the
microphone at the Model 26 and speak. If the time period for the Wait for Dispatcher
Time-out expires (refer to
Wait for Dispatcher Timeout on page 46) before the
microphone is keyed, the Model 26 sends a PA OFF command to the Model 6.
As long as the dispatcher’s microphone remains keyed, the PA at the Model 6’s station
stays on broadcasting the dispatcher’s announcements. When the dispatcher unkeys the
microphone the Model 26 waits for the Hold After Dispatch Time-out to expire before
sending a PA OFF command to the Model 6.
This command does not generate any tones at the Model 6. Station buttons representing
this command are not normally found on the Model 26. This station command is more
efficiently handled by a system button using the same command.
PA OFF
This command manually turns off a station PA. The PAs are normally turned off
automatically by the Model 26 once it completes an operation. This command is sent if a
station PA were mistakenly turned on. Station buttons representing this command are not
normally found on the Model 26. This station command is more efficiently handled by a
system button using the same command.
System Buttons
System buttons represent unaddressed unit and station commands. When a system button
is pressed, a unit or station button must also be pressed to obtain an address of where to
send the command. If a unit or station button is not pressed within 10 seconds of pressing
the system button, the function is canceled and the system button is deactivated. The
advantage of system commands is that there only needs to be one button for each
command. A system button can send its associated command to any station or unit in the
system as long as that unit or station has at least one unit or station type button on the
Model 26. The two exceptions to how system keys work are explained in the following
paragraphs.
ALL STATION ALERT
This command sends a Station Alert with PAs On to all stations without needing another
button to be pressed. It does this by addressing the command to all stations, broadcasting
it four times (100 milliseconds apart) and then polling each station for its status. This
button can also be used in conjunction with another system button that represents a
station type command. Used in this way the station type command would be broadcast to
all stations.