Epson MFJ-1278B manual Param ax0, Command Function Comments

MFJ-1278B MULTI-MODE ADVANCED OPERATION

Once the operating parameters have been selected, set KISS ON and then issue a RESTART command. The CON and STA LEDs will blink on and off three times to indicate that the MFJ-1278B has entered the KISS mode. Now you may call up a TCP/IP, or another host program that can use KISS or "SLIP".

If you find that the MFJ-1278B will not stay in KISS mode, then you will need to deactivate the KISSDOG timer. Deactivation of the KISSDOG is done by sending these three bytes to the TNC, $C0, $FD, $C0. This sequence will keep the TNC in KISS mode, until the MFJ- 1278B is told to exit KISS properly. Before enabling KISS, make sure radio baud rate and terminal baud rate are set to the desired values. The terminal's baud rate that's determined at sign on is the same that will be used for KISS. Once the operating terminal parameters have been selected you may enter KISS mode operation. If you are using the KA9Q TCP/IP software package, to return to normal AX.25 operation, issue the command:

param ax0 255

Note that this command must be issued under the TCP/IP "net>" prompt and lower case letters must be used. Once the MFJ-1278B receives the "param ax0 255" command, turns KISS off and will revert back to ordinary AX.25 mode of operation. When the MFJ-1278B is powered on again, it will sign on to the AX.25 operation mode. If you are not using the TCP/IP software package, you will need to send the three bytes $C0, $FF, $C0 to the MFJ- 1278B to restore normal operation. Once the MFJ-1278B receives the "param ax0 255" command, it turns KISS off and will revert back to ordinary AX.25 mode of operation. When the MFJ-1278B is powered on again, it will sign on to the AX.25 operation mode. If you cannot send these character values with the software you intend to use, you must power the MFJ-1278B off, then disconnect the bbRAM battery by removing JMP 5 on the MFJ- 1278B main board for several minutes, then reconnect the battery and power up again to restore normal operation. The commands available in KISS mode are:

Command	Function	Comments
0	Data Frame	The rest of the frame is data to be sent.
1	TXDELAY	The next byte is the transmitter keyup time in 10 mSec units,
		with a default of 50 (500 mSec).
2	P	The next byte is the persistence parameter, p, scaled to the
		range 0- 255. The probability of transmitting at the next
		opportunity is p/255. The default is 64 (for a probability of
		0.25).
3	Slot Time	The next byte is the slot interval in 20 mSec increments. The
		default is 10 (100 mSec).
4	TXtail	The next byte is the time to hold the transmitter after the FCS
		as been sent, in 10 mSec units. The command is obsolete and
		is included for completeness with earlier implementations.
5	FullDuplex	The next byte is 0 for half-duplex (normal) or any other number
		for full duplex (e.g., for operation with MicroStas).