PK-232 MBX Operating Manual - N3UJJ

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KIss "n" Default: 0
Mode: Packet
Host: KI
_________________________________ Parameters: _________________________________
"n" - Is a HEX number from $00 (KISS disabled) through $FF that enables the
KISS mode selected from the table below.
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The KISS mode must be entered to prepare the PK-232 for KISS operation. TCP/IP
and other special applications have been written that require the KISS mode be
enabled to operate correctly. For normal AX.25 Packet operation, this command
should be left at 0 or OFF (default).
The KISS command, formerly ON/OFF, has now been expanded to a numerical value
from $00 - $FF. This expansion supports G8BPQ's multi-drop KISS protocol. The
table below describes available KISS options.
KISS $00: KISS disabled (formerly displayed as KISS OFF)
KISS $01: Standard KISS (same as KISS ON or KISS YES)
KISS $03: Extended KISS
KISS $07: Extended KISS + KISS polling enabled
KISS $0B: Extended KISS + KISS checksum enabled
KISS $0F: Extended KISS + KISS polling and checksum enabled
Note that KISS ON enables standard KISS operation for compatibility with
existing applications.
Extended KISS mode adds these commands to the standard commands ($x0-$x5):
$xC signifies data to be transmitted. Unlike the $x0 command, the $xC byte is
followed by two frame ID bytes, then the data; when the TNC transmits the frame,
it notifies the host application by echoing back FEND, the $xC byte, the two
frame ID bytes, and FEND.
$xE is the polling command, similar to the HOST "GG" command existing in AEA
products. Polling makes multi-TNC KISS operation possible. If KISS polling is
enabled, the TNC holds received data until the host application sends the poll
command. If the TNC is holding no data, it echoes back FEND $xE FEND. The "x"
in "$xE" must match the number in the KISSADDR command for the TNC to respond.
If KISS checksum is enabled, a checksum byte is added to the end (before the
final FEND) of all KISS blocks flowing between the TNC and the host application.
The checksum is the exclusive-OR of all other bytes between the FEND bytes,
taken before KISS escape transpositions. A checksum is helpful when using
multiple TNCs on a marginal RS-232 link. If the PK-232 receives a KISS block
with a bad checksum, it does not transmit the data.
In KISS and Raw HDLC modes, communication activity on the RS-232 link is shown
by illuminating the STA and CON LEDs as follows:
Host to TNC Communication: STA LED illuminated.
TNC to host Communication: CON LED illuminated.
HOST OFF (3 s) will force KISS OFF. Details on the use of KISS TNC
protocol are contained in Timewave's Technical Manual for the PK-232.
8/91 A-45
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