Kantronics KPC–3 Plus User Manual page 169

FILTER {ON | OFF}
default OFF
When ON, this command will inhibit the printing of control characters (hex $00 - $1F)
which may be present in monitored packets. This will be useful if you are monitoring
channel traffic, which includes binary file transfers, or higher level protocols (networks
talking to each other). Control characters, which may be embedded in those packets,
can have strange and unpredictable effects on the monitoring TNC. All control
characters except carriage return ($0D) and line feed ($0A) will be filtered. This
command DOES NOT affect receipt of control characters in packets received from a
―connected‖ station when MONITOR or MCON is OFF.
See also: monitor
FLOW {ON | OFF}
default ON
When FLOW is ON, any character entered from the terminal will halt output to the
terminal until the current packet or command is completed (by SENDPAC, PACLEN, or
PACTIME). Canceling the current input to the TNC or typing the REDISPLAY-line
character will also cause output to resume. FLOW will keep the display of received data
from interfering with data entry.
When FLOW is OFF, received data will be ―interleaved‖ with keyboard entry. If using a
split screen terminal program, you should have FLOW OFF and ECHO OFF to allow
received data to be displayed while you type into the TNC's type-ahead buffer.
See also: canline, canpac, cpactime, echo, paclen, redisplay, sendpac
FRACK n
default 4
Each increment specifies 1-second intervals. After transmitting a packet requiring
acknowledgment, the TNC waits FRACK seconds before incrementing the retry counter
and sending the packet again. If the retry count (specified by the RETRY command) is
exceeded, the current operation is aborted. If the packet address includes digipeaters,
the time between retries is adjusted to FRACK * ((2 * m) + 1) where m is the number of
digipeater stations specified. When the retried packet is sent, a random wait time is also
added to avoid lockups where two units repeatedly collide with each other.
The FRACK timer begins when PTT is released (the packet has been sent) and is
suspended when data carrier from the radio is present, or when your station is
transmitting.
See also: connect, resptime, retry
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(n = 1 - 15)