MFJ-1270C/1274C MANUAL BASIC OPERATION
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A Connecting and Disconnecting Exercise
Packet radio QSOs are started by a connect process, which sets up the
"handshaking" between the two stations that insures error-free communications.
QSOs are terminated by a disconnect process, which leaves both stations free to
start new QSOs. Packet QSOs can also make use of digipeaters, other packet
stations which can automatically relay packets from one station to the other over
a specified route.
To see how this works, you can have the MFJ TNC connect to itself. Since you
have set the MFJ TNC up for digital loop-back, it will receive all packets that it
sends. Try the following:
cmd:FULLDUP ON
cmd:CONNECT K5FLU
*** CONNECTED to K5FLU
replacing K5FLU with your own call sign. The MFJ TNC generates packets
initiating and confirming the connection. The packets aren't actually converted
to audio signals and transmitted over the radio, but they are otherwise just like
packets you will be transmitting later on.
The *** CONNECTED to message tells you that the connection was
successful. You should also notice that the CON LED has lit up and that you do
not
see a new cmd: prompt on the next line. You are now in Converse Mode,
ready to start talking. Try it. Type your message, ending the line with a <CR>.
Hello, there.
Hello,
there.
The <CR> causes your message to be put into a packet, or "packetized," and
transmitted. (We explain in the next chapter how you can use a different
character to send packets.) The underlined
text is a message that the MFJ TNC
received in a packet and displayed. Whenever you are in Converse Mode any-
thing you type will be assembled into a packet addressed to the station you are
talking to and transmitted. If there isn't a QSO (connection) in progress, the
packet will be sent to the address CQ.
In the example above, the MFJ TNC entered Converse Mode automatically after
the connect took place. You can also command the MFJ TNC to move
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