with the switchboard.
5) From the switchboard, key in the number with which you wish to
program the internal unit and route the call by pressing button
.
6) Wait for the LED switching off on the interphone for the programming
confirmation.
7) Program the remaining internal units following the same procedure
outlined above.
N.B
.: The audio line between the switchboard and interphone is only
connected when the led in key
illuminates. Consequently, if the
LED is switched off, press button
again until it illuminates. The
LED remains illuminated for the maximum conversation time set for the
switchboard.
Programming digital distributors 949B
1) Briefly press button PS1on the digital distributor.
2) Press then button PS2 on the digital distributor until the first of four
LEDs on the distributor illuminates.
3) If the LED does not illuminate, repeat the above steps from point 1.
4) Remove the handset from the interphone or monitor connected to
terminals A1 and A3 of the digital distributor in question and check
the audio connection with the switchboard.
5) From the switchboard, key in the number with which you wish to
program the internal unit and route the call by pressing button
.
6) Wait for the LED switching off on the interphone for the programming
confirmation.
7) To program the remaining three internal units (interphones or moni-
tors) connected to the distributor in question, press button PS1 again
and hold button PS2 pressed down until the corresponding LED illu-
minates on the distributor (second, third or fourth LED).
8) The LEDS illuminate to indicate which internal unit is currently being
programmed as illustrated in the table below, whereby:
LED 1 ¬ ® Terminals A1 and A3
LED 2 ¬ ® Terminals B1 and B3
LED 3 ¬ ® Terminals C1 and C3
LED 4 ¬ ® Terminals D1 and D3
9) Program the remaining internal units following the same procedure
outlined above.
N.B
.: The audio line between the switchboard and monitor is only con-
nected when the led in key
illuminates. Consequently, if the LED
is switched off, press button
again until it illuminates. The LED
remains illuminated for the maximum conversation time set for the
switchboard.
INSTALLATION OPERATION
Standard power supplier 6948 is fitted in DIGIBUS video door entry
systems to power the monitors, interphones, digital distributors, en-
trance panels and switchboard. In some installations however, due to
particularly long cable runs prone to excessive voltage drops or the
number of internal units installed, the following additional power supply
units may be installed: 6942 which powers the entrance panels, switch-
board, digital distributors, interphones and monitors (digital circuit), and
6947 which powers the monitors and regenerates the call signal. For
more information about the layout of power suppliers, refer to the corre-
sponding installation wiring diagrams. To call internal units (interphones
or monitors) from the entrance panel or switchboard, simply key in the
user number on the entrance panel or switchboard keypad and press
button “C” or
to route the call. To cancel the call, simply press
button “R”.
After the call button has been pressed, the entrance panel or switch-
board transmits a digital code which connects the internal unit. The first
entrance panel or switchboard connected to the monitor (or interphone)
cable riser then briefly disconnects the power supply to the + and - ter-
minals of the cable riser so that any activated monitors are switched off.
Next, the entrance panel or switchboard activates the call generator in-
side the power supplier for the set call time and routes the call signal to
the cable riser. At the end of the call signal, the interphone or monitor
phonic line connects to the external entrance panel or switchboard. In
the case of video monitors and entrance panels or monitors and switch-
boards with video camera units, the monitor displays the image filmed
from the entrance panel or switchboard video camera respectively.
Once the interphone or monitor is connected, its door lock release
is enabled. The auxiliary functions may be activated irrespec-
tive of whether the internal unit is activated or not. However, the door
lock release button
will only release the entrance panel door
lock if the internal unit is connected to the external entrance panel. Oth-
erwise it will call the porter’s switchboard. Once the call has been routed
to the internal unit, the two units will only remain connected for the reply
delay time set for the entrance panel or switchboard. If the delay time
elapses before the handset is lifted, the entrance panel or switchboard
disconnects the internal unit. If instead the handset is lifted within the set
reply time, the call is connected and the two units can communicate for
the maximum conversation time. If the handset is replaced before the
maximum conversation time has elapsed, the interphone or monitor is
disconnected after about 5 seconds.
9
EN
6948 - 6948/120
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