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will initiate transmission of an acknowledgement containing the mode and frequencies from
the received call.
Stops transmission and returns to the
previous display
Transmission of the DSC acknowledgement takes approx. 8 seconds. Then the equipment is
automatically set to the mode and working frequencies from the acknowledgement, and
voice communication can start.
Returns to previous telephony display
When handset is placed on hook the equipment returns to previous telephony setting.
Direct Dial Calls:
Some coast stations provide automatic connection from the public switched telephone
network allowing a telephone subscriber to call the ship directly without operator intervention
at the coast station.
Note: Auto Acknowledgement must be On to allow automatic connection, see DSC Status
Display.
An acknowledgement is initiated immediately when a Direct Dial call is received. The
handset should be lifted off hook within 1 minute which will initiate a DSC call on the working
frequency. This call is used by the coast station for channel quality evaluation. When
acknowledgement is received telephone conversation can start.
When the handset is placed on hook after a Direct Dial call a DSC call indicating ‘End of call’
is send to terminate the connection.
The coast station may respond with a DSCall indicating the chargeable duration of the
connection.
Sending a Test Call
This call type is intended for test of the DSC system on distress and safety frequencies.
Press
Select SHORE call types
0131
