Calling a Single Radio Subscriber
To activate one of the eight channels push the corresponding selection button. To
deactivate a channel again push the corresponding selection button once more.
Depending on the configuration of the EEPROM-Register 030 in bit 1 you can either
select several channels simultaneously or only one channel at a time.
register 030 number of circuits that can be selected
bit 1: 0 = several channels simultaneously (cumulative)
1 = only one channel at a time selected
When channels are activated the channel selection LED lights up. If the channel has
already been selected by a different Major BOS 8a the device can be programmed so that
the corresponding channel selection LED flashes.
In EEPROM register 024 you can preselect which of the channels 1..8 (bit 0..7) is
automatically selected after turning on the control set.
register 024 selected channels after turning on
bit 0: channel 1 no / yes (0/1)
bit 1: channel 2 no / yes (0/1)
bit 2: channel 3 no / yes (0/1)
bit 3: channel 4 no / yes (0/1)
bit 4: channel 5 no / yes (0/1)
bit 5: channel 6 no / yes (0/1)
bit 6: channel 7 no / yes (0/1)
bit 7: channel 8 no / yes (0/1)
It is possible to configure the EEPROM-Register 027 so that the selected channels are
automatically saved in the EEPROM-Register 024 when the radio installation is turned
off.
Register 027 angewählte Kreise speichern Nein/Ja (00/01)
Communicating with the Radio Subscriber
There are three different ways of communication with a calling radio subscriber:
a) By pushing one of the red PTT buttons the transmitter of the corresponding channel
is activated and you can talk to the caller through the gooseneck microphone. (It is also
possible to connect an external switch contact instead of a PTT button. See section Opto-
Coupler input.) After pressing the PTT button the caller can be heard on the loudspeaker.
The receiver volume of the corresponding channel is adjustable.
b) By picking up the handset and pushing the PTT button on the inside of the handset.
By doing so the transmitter of the selected channel is activated (PTT LED lights up) and
you can talk with the caller through the microphone of the handset. Depending on the
configuration you can hear the caller constantly on the handset or only after deactivating
the PTT button. The call is ended by replacing the handset. The volume of the earpiece
and the microphone are each adjustable by a potentiometer. The potentionmeter is situ-
ated near the earpiece of the handset and is easily accessible from the outside, using a
screw-driver through a small opening on the inside of the handset.
