Furuno FM-4850, Operator'S Manual

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FM-4850 Operator’s Manual DIGITAL SELECTIVE CALLING
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When the channel change mode is "MANUAL"
Step 1 When an individual call is received, the alarm sounds. Rotate the
Menu/DSC control to stop the alarm.
The following screen appears. The screen shows the MMSI of the vessel
calling and three soft keys:"ACCEPT", "REJECT", and "CANCEL". If the
requested channel cannot comply, the screen only shows two soft keys:
"REJECT" and "CANCEL".

ACCEPT: Select the soft key to continue with the call and switch to the
requested channel.

REJECT: Select the soft key to reject the call. After you select
"REJECT", select a reason for rejecting the call, and then an "UNABLE
ACK" message is sent. After the message is sent, the radio returns to
the home screen and the channel remains unchanged.

CANCEL: Select the soft key and then the radio returns to the home
screen and the channel remains unchanged.
Step 2
Select "ACCEPT".
Note
When CH70 is busy, the radio will wait until CH70 is idle.
Then the radio sends an acknowledgement and the requested channel is
selected, ready for a conversation.
Step 3
Press and hold the PTT key to talk into the handset.
4.5 Group Call
This feature allows you to contact a group of specific vessels (for example,
members of a yacht club) using DSC radios that have a group call function. When a
group call is sent, all DSC radios in the group automatically switch to the channel
specified in the call to prepare for voice communications. This feature is useful for
yacht clubs and vessels traveling together that want to collectively make
announcements on a predetermined channel. Up to 40 group call MMSIs can be
programmed.