PK-232 – MBX OPERATING MANUAL COMMAND SUMMARY
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Without the CHECK feature, if your PK-232 were connected to another station and the other sta-
tion disappeared, your PK-232 would remain connected indefinitely, perhaps refusing connections
from other stations.
Your PK-232 tries to prevent this sort of "lockup" from occurring depending on the settings of
AX25L2V2 and RECONNECT, by using the CHECK timer as follows:
o If a Version 1 link is inactive for (CHECK times 10 seconds), your PK-232 tries to save the
link by starting a reconnect sequence. The PK-232 enters the "connect in progress" state
and sends "connect request" frames.
o If a Version 2 link (AX25L2V2 ON) is inactive and packets have not been heard from the
distant end for "n" times 10 seconds, your PK-232 sends a "check packet" to test if the link
still exists to the other station. If your PK-232 does not get an answer to the "check packet"
after RETRY+1 attempts, it will attempt to reconnect to the distant station.
See the RELINK command.
CHSwitch "n" Default: $00
Mode: Packet Host: CH
Parameters: "n" - 0 to $FF (0 to 255 decimal) specifies an ASCII character code.
CHSWITCH selects the character used by both the PK-232 and the user to show that a new con-
nection channel is being addressed. DO NOT USE $30 to $39 (0 to 9).
If you plan to use multiple packet connections, you MUST select a CHannel SWITCHing character.
This character will be interpreted by the PK-232 to indicate that you want to select another "logi-
cal" packet channel.
The vertical bar "|" ($7C) is not used often in conversations and makes a good switching character.
To make the Channel Switching character the vertical bar, simply enter the command CHSWITCH
$7C.
To change the logical Packet channel you are using with the PK-232, then simply type the vertical
bar | followed by a number 0 through 9 indicating which logical channel you wish the PK-232 to
use.
See CHDOUBLE and CHCALL for further information on the use of CHSWITCH.
CMdtime "n" Default: 10 (1000 msec.)
Mode: All Host: CQ
Parameters: "n" - 0 to 250 specifies TRANSPARENT Mode time-out value in 100-millisecond
intervals.
If "n" is 0 (zero), exit from Transparent Mode requires sending the BREAK
signal or interruption of power to the PK-232.
CMDTIME sets the time-out value in Transparent Mode. A guard time of "n" times 10 seconds al-
lows escape to Command Mode from Transparent Mode, while permitting any character to be sent
as data.
The same Command Mode entry character COMMAND (default <CTRL-C>) is used to exit Trans-
parent Mode, although the procedure is different than from Converse mode. Three Command
Mode entry characters must be entered lose than On'. times 10 seconds apart, with no intervening
characters, after a delay of 'n' times 10 seconds following the last characters typed.
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