14
Using Two Control Units
You can connect two control units to the system. However, it can
only be controlled by one control unit at a time.
Priority of Control Unit #1
Control unit #1 has the highest priority, i.e. you can always control
the system by means of control unit #1 – even if control unit #2 has
initiated a distress call.
Control Unit #2 Taking Over the Control
When control unit #1 is in the DSC Status Menu, control unit #2 can
take over the control of the system by leaving the DSC Status Menu.
When control unit #2 returns to the DSC Status Menu, the control is
automatically given back to control unit #1.
Status Indication
Control Unit #1:
When control unit #2 controls the system, the display of control unit
#1 shows what activity is taking place. The following read-outs may
appear:
•
”
OCC by unit 2 sending Distress alert” means that control
unit #2 is transmitting a distress call, or awaiting automatic
retransmission.
•
“
OCC by unit 2 sending DSC call” means that control unit #2
is transmitting an ordinary DSC call.
•
“
OCC by unit 2 using DSC functions” means that control unit
#2 is in a DSC menu without transmitting a call.
•
“
OCC by unit 2 using Radio functions” means that control
unit #2 is not in a DSC menu.
Control Unit #2:
The display of control unit #2 always shows when the system is
busy. When the system is not busy, the display shows the DSC
Status Menu.
If control unit #2 tries to take over the control, but is not allowed to do
so, this is indicated by both a sound and the display read-out “
OCC
by unit 1”.
Responding to Incoming DSC Calls
When a call comes in, only the active control unit – i.e. the one that
controls the system at the moment – is to respond.
If for instance control unit #2 has sent an individual DSC call, control
unit #2 is to receive and respond to the acknowledgement call that
may follow.
If a call comes in when both control units are in the DSC Status
Menu, and therefore not active, both control units are to receive and
respond to the call.
Power On/Off By Control Unit #2
Power On
You can turn on the whole system by means of control unit #2. If the
display shows the words “
Unit switched off”, and the on/off button is
pressed, what happens depends on whether or not control unit #1 is
controlling the system at the moment:
a) If control unit #1 is controlling the system, this will be
indicated by the display of control unit #2.
b) If control unit #1 is not controlling the system, control unit #2
will start up in the DSC Status Menu.
When the whole system is off, it makes no difference which control
unit turns it on.
Power Off
You cannot turn off the whole system by means of control unit #2.
When you press the on/off button, only control unit #2 is turned off.
The display will then show the words “
Unit switched off”.
Interconnecting
When you have received a DSC call, including working frequency, it
is possible to transfer the system control from control unit #1 to
control unit #2. To do so, in the Frequency menu, key: “
Shift” + “INT-
C/InterCom”.
When a DSC call is transferred from control unit #1 to control unit #2,
the right working frequencies are maintained.
If the handset of control unit #2 is not lifted within five minutes, the
control automatically returns to control unit #1.
DSC Scanning Frequencies
You cannot change the DSC scanning frequencies by means of
control unit #2. The scanning frequencies used when in the DSC
Status Menu of control unit #2 are the same as if in the DSC Status
Menu of control unit #1.
If control unit #1 changes the DSC scanning frequencies, that
information is passed on to control unit #2. Therefore, if control unit
#2 is given the control, and starts scanning, the same scanning
frequencies are used.