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KISS Mode
Amateur packet radio communications can use the TCP/IP suite of protocols instead of
AX.25 by switching to KISS mode and running software that supports the KISS code
designed by Phil Karn (see references at end of this section). The KISS protocol
specifies the communication between a TNC and a host (e.g., computer).
KISS Mode allows the TNC to act as a modem and packet assembler/ disassembler
(PAD). In KISS Mode, data processing is shifted from the TNC to a computer running
special software supporting the KISS code designed by Phil Karn. KISS code supports
higher level protocols (i.e. TCP/IP) for sharing computer resources in a network fashion.
Examples of TCP/IP programs are NET, NOS, and JNOS. Also, some networking
software (G8BPQ) requires the KISS Mode of operation.
Technical Note: In the KISS Mode, the TNC simply passes all received data to your
computer, and the computer program is responsible for all processing of that data,
including decisions concerning routing, digipeating, and other control decisions. The
TNC converts the packets of synchronous data being received from the radio link into
packets of asynchronous data to be passed to the computer over the serial port, and
converts the packets of asynchronous data from your computer into the synchronous
format suitable for radio transmission. The TNC retains the responsibility of determining
proper timing for channel access.
To place your TNC in KISS Mode, you must first have the command prompt (cmd:).
Then type INTFACE KISS and press return. And, finally, do a RESET.
After that you will not see any message or any prompt back from the TNC, it will now be
in KISS mode.
If you turn your unit off while it is it INTERFACE KISS mode, it will still be in KISS mode
when you turn it back on. To get out of KISS mode, either:
perform a hard reset, or
use the TCP/IP command (available in KISS software while in KISS mode), or
send the C0 FF C0 sequence from your keyboard.
To send the C0 FF C0 sequence from your keyboard (using a PC compatible
computer):
1. Press and HOLD the ALT key. Type the numbers 192 from the numeric
KEYPAD, not the keyboard. Release the ALT key.
2. Press and HOLD the ALT key. Type the numbers 255 from the numeric
KEYPAD, not the keyboard. Release the ALT key.
3. Press and HOLD the ALT key. Type the numbers 192 from the numeric
KEYPAD, not the keyboard. Release the ALT key.
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