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10. NBDP TRANSMISSION, RECEPTION
10-3
For the ARQ mode, go to step 10. For the FEC mode, type your message then go
to step 14.
10. Press the function key F7. The party's answerback code appears on the screen.
Note: Step 10 and 11 are needed for ship-to-ship calling only.
11. Press the function key F8. Your ship's answerback code is sent to the party.
12. Press the Enter key and type your message.
13. If you want to receive other party's response, press the function key F9.
14. Press the function key F10 to disconnect the line.
10.2 ARQ Mode Operation
In ARQ operation, one station (information sending station) sends data to another
block by block, then listens for the acknowledge signal between blocks from the infor-
mation receiving station which requests either the next block or retransmission of the
last block if there is an error. The request can be repeated up to 32 times until the com-
plete block is received free of error.
How to establish connection
1. Press the function key F3 to open the [Operate] menu.
2. Press the 1 key to select [Call Station].
3. Select a station. (Station must be registered for use in the ARQ mode).
4. Press the Enter key. The message "Calling Station" appears. If the message
shown below appears, check both the power of the radiotelephone and the con-
nections between the radiotelephone and the NBDP terminal unit.
Message: "Station calling suspended. Check interconnections between the termi-
nal and main units. Press any key to escape."
When an acknowledge signal is detected, "Connect" appears in reverse video on
the [Comm Status] line.
Note: If the signal conditions are poor, connection can take a while. If the line
could not be connected in one minute, the calling stops. The message "Station
calling suspended" appears. Try step 3 again, one minute later. Should the signal
conditions worsen during message transmission, "Error" appears in reverse video
on the [Comm Status] line and the line is disconnected.
5. Transmit message by one of the following methods:
How to send a file stored on a floppy disk or an SD card
1) Press the function key F7 to request the answerback code of the other station.
Verify that the code from the station called is correct.
Connect Send Lock