3-FTCU operating instructions
EST3 System Operation Manual 4.5
Answering incoming calls
An incoming call is initiated when a firefighter telephone is
taken off-hook or plugged into a remote telephone jack. The
caller hears a tone, indicating the connection is good, and the
call-in buzzer is activated at the 3-FTCU.
Display
The number of incoming calls is always listed on the top line of
the display. The identification of the incoming call appears in
reversed text on the second line of the display, as shown in
Figure 4-4. Should multiple calls be pending, the reversed text
display will slowly sequence through the incoming calls.
[3FTCUOP4.CDR]
Pending Call Counter
Pending Call Identificatio
(multiple pending call are
displayed sequentially)
Connected Calls Counter
0 Calls Connected
2 Calls Pending
First FL stairwell
Figure 4-4: Incoming Call, 3-FTCU Display
To answer an incoming call
1. Silence the call-in buzzer by pressing the ACK
(acknowledge) switch. The buzzer will re-sound each time a
new incoming call is received.
2. If multiple calls are shown in the display, stop the call
identifier sequencing by pressing the Review Pending switch
once. Each additional activation of the Review Pending
switch manually steps the display through the list of
incoming calls. When the desired call appears on the
pending calls identification line, stop stepping through the
calls.
3. To answer the selected call, press the Connect switch. The
call identifier will move from the pending calls
identification line of the display to the connected call list at
the bottom of the display, as shown in Figure 4-5. Once
connected, you may begin your conversation.
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