Chapter 5: Digital Selective Calling (DSC)
69
Press
PTT
to communicate on the specified channel. Pressing PTT at any time
before an ACK is received cancels the Individual Call
Receiving Individual Calls
When an Individual Call is received, an alert tone sounds, the envelope icon blinks
and the LCD alternates among 3 screens displaying the name (or MMSI ID) of the
station initiating the call and that a request for a change of working channels is
being made. The channel does not change until you accept.
The 3 alternating pages of data are recorded in the Call Log. The envelope icon
(
)
blinks until you accept the call, reject the call, or open the resulting unread
message stored in the Log. See page “Received Calls (Logs)“ on page 79.
To mute the alert tone:
Press
CLR/WX
.
Automatic cancellation takes place after 2 minutes.
To ignore the Individual Call:
Press
CLR/WX
a second time. The envelope icon disappears, the call is interrupted
and the normal screen appears on the LCD.
To accept an Individual Call:
1. Press
CH/OK
to change channels to the one designated by the caller. The alert
tone is muted and the envelope icon disappears.
2. If the caller requests an acknowledgement, press
CH/OK
to send.
3. When the caller responds to the ACK, press
CH/OK
to return to standby mode.
Establish voice communications on the designated channel by pressing
PTT
.
If the caller requests that you change to an unsupported working channel the
message INVALID CHANNEL appears on the LCD. If an acknowledgement is sent,
the originating station is sent the message UNABLE TO COMPLY, indicating that
your radio could not make the requested channel change.
D10173-1
72
IND ROUTINE
TOTL MADNES
AWAITING ACK
68
ACK RECEIVED
TOTL MADNES
CH HAS BEEN
CHANGED
68
ACK RECEIVED
TOTL MADNES
PRESS [OK]
REPEATS
INDIVIDUAL
ROUTINE
FROM:
GOOD RX
68
INDIVIDUAL
ROUTINE
CH CHANGE
REQ TO CH72
68
INDIVIDUAL
ROUTINE
PRESS OK OR
PRESS CLR
68
D10174-1
