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+ If you are in Transparent Mode sending a file, the computer does not need to tell
the TNC to stop and start (since you are sending the file). By turning TRFLOW
OFF and TXFLOW ON, the TNC will accept START and STOP characters em-
bedded in the file and send them along to the radio as data. Meanwhile, the TNC
can send the XOFF and XON characters to the computer to control the flow of
data from the computer. When receiving a file, turn TRFLOW ON and TXFLOW
OFF; the computer will accept all data and use START and STOP characters to
control the flow of data from the TNC.
Hardware Flow Control
Hardware flow control monitors the voltages on the RTS and CTS pins of the
RS-232 cable. Therefore these two pins must be wired between your TNC and a
connected computer. The TNC holds CTS high as long as it can receive data.
Once its buffer gets full, it pulls this line low. The computer program monitors
this line. When it is pulled low, it knows to stop sending data. When the line is
again pulled high by the TNC, the computer program will restart sending data.
On the other hand the computer holds RTS high as long as it can receive data and
pulls it low to tell the TNC to stop sending data. The TNC always uses hardware
flow control, so only wire the RTS and CTS pins if your computer program is
also using hardware flow control.
+ Pacterm uses hardware flow control, but some communication software does
not.
Convers Mode vs. Transparent Mode
In the Convers Mode there are many special characters. To list a few:
Command
Default Description
SENDPAC
<Ctrl+M> Causes a packet to be formed
DELETE
<Ctrl+H> Backspace character
REDISPLAY <Ctrl+R> Redisplays the keyboard buffer
CANLINE
<Ctrl+X> Cancels a line
STOP
<Ctrl+S> Stops output from TNC to computer
PASS
<Ctrl+V> Pass a special character
These characters are all very useful when having a packet conversation with
someone. If you want to send a packet you hit the return. If you make a mistake
Packet Mode of Operation
Modes of Operation
KPC-9612 Plus v 8.2
119
User’s Guide
Содержание KPC-9612 Plus
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Страница 78: ...Installing Your KPC 9612 Plus User s Guide 62 KPC 9612 Plus v 8 2...
Страница 122: ...Getting Started Other Topics User s Guide 106 KPC 9612 Plus v 8 2...
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Страница 301: ...Command Reference KPC 9612 Plus v 8 2 285 User s Guide...
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