I C S - 2 1 / 2 1 D T S P E A K E R S T A T I O N
1 - 3
Answering a Call from the Answer-Back Stack
To answer a call from the answer-back stack:
1. Press and release the answer-back button to select the longest-waiting call.
2. Press the answer-back button while responding. The call-waiting light will be
on steadily.
Terminating Calls Answered with the Answer-Back Button
To terminate the call answered with the answer-back button, turn off the
call-waiting light, and recover the previous call:
• The receiving station can terminate the call by pressing and releasing the
answer-back button.
• The calling station can terminate the call.
Answering Another Call from the Answer-Back Stack
To answer another call from the answer-back stack:
• If the calling station disconnected the call, the call-waiting light will flash.
• If the receiving station disconnected the call, a call from another unselected
label will be activated when the answer-back button is released.
Sending a Call Signal
The answer-back button can send call signals to a station or interface currently
on the selected talk/listen path when the call-waiting light is not on. The light
will turn on when the button is pressed and turn off when it is released.
Receiving a Call Signal
The call-waiting light turns on when another station sends a call signal and
remains on during the call.
Intercom-Level Control
This control sets the speaker’s required listen level, but does not affect the
program-input level.
Program-Level Control
This control sets the program input’s audio level in the panel speaker.
Integral Microphone
This microphone is built into the front panel.
• The call-waiting light does
not light when a call is
received from a
programmed label.
• Note: The configuration
program can be set to
also send an audible
signal through the
speaker, which can only
be heard if the intercom
level is turned up.
• Note: Forcing the
trimpots past their stop
points will damage them.
Summary of Contents for ICS-21
Page 1: ...SPEAKER STATION I N S T R U C T I O N M A N U A L ICS 21 21DT...
Page 4: ...I C S 2 1 2 1 D T S P E A K E R S T A T I O N...
Page 13: ...I C S 2 1 2 1 D T S P E A K E R S T A T I O N 1 9...
Page 15: ...I C S 2 1 2 1 D T S P E A K E R S T A T I O N...
Page 16: ...I C S 2 1 2 1 D T S P E A K E R S T A T I O N...
Page 18: ...I C S 2 1 2 1 D T S P E A K E R S T A T I O N...
Page 22: ...I C S 2 1 2 1 D T S P E A K E R S T A T I O N 4 4 Figure 6 Main PCB Component Layout...
