3-ASU operating instructions
EST3 System Operation Manual 3.3
Functional description of 3-ASU controls and indicators (see Figure 3-1)
Index
Control or
Indicator Functional Description
1
Push-To-Talk
(PTT) Switch
Push the PTT switch and wait for the Ready to Page LED
(item 4) to light steadily before making an announcement.
2Paging
Microphone
Speak into the microphone to make an announcement.
3 Page Level Meter Indicates paging volume. When paging, speak at a level that
causes the far right LED to only flicker occasionally.
4
Ready to Page
LED
Green LED flashes during pre-announcement tone, then is on
steady when the system is ready to page.
5
All Call
Switch/LED
Green LED on indicates the 3-ASU is in the All Call mode.
Pressing the All Call switch directs the page to all areas of the
facility. To exit the All Call mode, press the switch a second
time or press the All Call Minus, EVAC, or Alert switches.
6 All Call Minus
Switch/LED
Green LED on indicates the 3-ASU is in the All Call Minus
mode. Pressing the All Call Minus switch directs the page to
the areas of the facility which have not been automatically
selected to receive the EVAC or Alert tone/message. To exit
the All Call Minus mode, press the switch a second time or
press the All Call, EVAC, or Alert switches.
7 Phone Page
Switch/LED
Green LED on indicates the 3-ASU is in the Phone Page
mode. Pressing the Phone Page switch replaces the paging
microphone (item 2) with the firefighter’s telephone system.
Individuals in remote areas of the facility can then issue a
page via the firefighter’s telephone system. All phone paging
is under the direct control of the 3-ASU operator. Press the
switch a second time to disconnect the Phone Page mode.
8 EVAC Switch/LED Green LED on indicates the 3-ASU is in the EVAC mode.
Pressing the EVAC switch directs the page to areas of the
facility which are automatically receiving the evacuation
tone/message. To exit the EVAC mode, press the switch a
second time or press the All Call, All Call Minus, or Alert
switches.
9 Alert Switch/LED
Green LED on indicates the 3-ASU is in the Alert mode.
Pressing the Alert switch directs the page to areas of the
facility which are automatically receiving the Alert
tone/message. To exit the Alert mode, press the switch a
second time or press the All Call, All Call Minus, or EVAC
switches.
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