30
INSTALLER SECTION
System Functions
Pressing the Call key also causes the doorbell
contacts to close for a minimum of 4 seconds
to activate a separate doorbell or other device
connected to the door station. The actual time
varies with the doorbell selection on hub 1; the
contacts remain closed for the duration of the
selected chime.
Also, all keypads indicate which door station is
calling, regardless of whether or not they’re in
DND mode. The indication remains for 15 sec-
onds, during which the door station is selected
at each keypad for reply.
Within the 15 seconds, a person at any keypad
can then speak with the person at the door
while holding in the Talk key. If the 15 seconds
pass before the Talk key is pressed, the person
inside will need to first select the door station
on the keypad and then press the Talk key to
start a new session. This will not activate the
doorbell chime.
When a door call is answered from inside, the
release of the Talk key at the keypad triggers a
single ping at the door station to let the caller
know they can reply. The person at the door
station has a 7-second window for a hands-free
reply after the single ping. The caller has the
option of speaking within the 7 seconds or
pressing and holding the Call key to speak
longer. Holding in the Call key keeps the audio
bus switched to the door station’s microphone.
If the 7-second hands-free window ends before
the caller presses the Call key to speak, the
door station sounds a double ping indicating the
audio bus has opened. At this point the caller
must press the Call key again to request anoth-
er session if they wish to speak longer. This
also rings the doorbell again.
Door strike release
The optional ISDR1 Door Strike Release module
can be activated from any keypad at any time.
When activated, the module stays active for 3
seconds, confirmed by a buzz tone at the key-
pad and the door station.
On an ISK1 Basic Keypad, the module is activat-
ed by pressing and holding the appropriate door
key for 3 seconds.
When a communication session is active
between a door station and an ISK2 Advanced
Keypad, the module can be activated by press-
ing and holding both the Previous and Next keys
for 3 seconds. If no session is active, the door
will first need to be selected on the keypad.
Listen mode
Listen mode is a system state in which one key-
pad has a constantly active microphone and
one or more other keypads are receiving its
audio signal. This mode is subject to temporary
interruption when the system is used for pag-
ing, intercom, or door station sessions.
Selecting a keypad’s own zone connects its
microphone to the audio bus 2 seconds after
the selection is made. That zone then becomes
the sending zone for Listen mode. The keypad’s
Talk key lights up red to indicate the micro-
phone is on. In addition, the zone key on an
ISK1 Basic Keypad blinks red and the display on
an ISK2 Advanced Keypad shows
MicOn
.
If another zone is already selected as a sending
zone for Listen mode, the keys on the Basic
Keypad for both the active zone and the desired
zone alternately blink red for 7 seconds to indi-
cate which zone’s microphone is active. The
Advanced Keypad alternately displays the active
zone and
MicOn
for 7 seconds.
Door station call
(cont’d)