Ppersist; Rawhdlc; Redispla - Advanced Electronic Applications PK-88 Operating Manual

PK-88 OPERATING MANUAL
The default value of 63 assumes that there are four stations on your channel. Modify this value ac-
cording to your local conditions.
NOTE: P=255 means 'always transmit as soon as possible, regardless of the random num-
ber'.
See Chapter 6 for additional information on p-persistent operation.
PPERSIST ON|OFF
Parameters: ON
tent
OFF
Use the PPERSIST command to switch the PK-88 from 1-persistent CSMA operation based on the
DWAIT value to p-persistent CSMA operation. This is required when using host computer applica-
tions based on the TCP/IP protocols and in certain electronic mail and bulletin board programs.
When PPERSIST is set ON, the PK-88 uses the PERSIST and SLOTTIME parameters for p-persistent
CSMA instead of the normal AX.25 protocol DWAIT procedure to achieve CSMA operation.
PPERSIST is used in KISS TNC and, under certain specific conditions, in AX.25 operation.
See PERSIST and SLOTTIME in this chapter.
See Chapter 6 for additional information on p-persistent operation.
RAWHDLC ON|OFF
Parameters: ON
OFF
Some host computer applications do not use AX.25 protocols. In such cases, the PK-88 can be op-
erated as a raw HDLC controller, allowing the host to provide all protocol commands and re-
sponses. Applications may include some types of electronic mailsystems, bulletin board programs
and computers operating with TCP/IP and other communication protocols.
Use the RAWHDLC command to disable AX.25 protocols and permit the host system direct access
to the PK-88's HDLC integrated circuit.
RAWHDLC must be set ON when using KISS TNC protocols with TCP/IP.
n

REDISPLA

n
Parameters:
REDISPLA changes the redisplay-line input editing character.
n
Parameter is the numeric ASCII code for the character to use when you want to re-display the
current input line. You can enter the code in either hexadecimal or decimal numbers.
Type the REDISPLA character to redisplay a line you've just typed. The following things happen:
Mnemonic: PP
The PK-88 uses PERSIST and SLOTTIME parameters in executing p-persis-
CSMA (Carrier Sense Multiple Access).
The PK-88 uses DWAIT for AX.25-type 1-persistent CSMA.
Mnemonic: RAW
The PK-88 functions as a direct or raw HDLC controller.
The PK-88 functions as a normal AX.25 controller.
Mnemonic: RED
0 to $7F (0 to 127 decimal) specifies an ASCII character code.
Default: ON
Default: OFF
Default: $12 [^R]
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COMMAND SUMMARY
PK-88 - 132