COMMANDS
17
DISPlay
[c]
immediate
All Units
Packet
This command causes the TNC to display a list of all the parameters in the TNC. You may also dis-
play only selected parameters by specifying the appropriate class identifier for that group. When
using DISPLAY command with a subclass be sure to use a space between the DISPLAY command
and the subclass. Subclasses of related parameters are:
(A)sync
asynchronous port parameters
(C)haracter
special characters
(I)d
ID parameters
(L)ink
parameters affecting packet, link
(M)onitor
monitor parameters
(T)iming
timing parameters
(X)t
parameters of non-packet modes only
Individual parameter values can be displayed by entering the command name followed by
<CR>
.
DWait
n
(n = 0 – 255)
default 0
KPC-1
/
KPC-2
/
KPC-2400
Packet
default 0/0
KAM
/
KPC-4
Packet
Each increment specifies 10 ms intervals. This value is used to avoid collisions with digipeated
packet. The TNC will wait n × 10 ms after last hearing data on the channel before it begins its own
keyup sequence. This value should be established and agreed on by all members of a local area
network. The best value will be determined by experimentation but will be a function of the keyup
time (TXDELAY). This feature is made available to help alleviate the drastic reduction of through-
put which occurs on a channel when digipeated packets suffer collisions. Digipeated packets are
not retried by the digipeater but must be restarted by the originating station. If all stations specify
DWAIT, and the right value is chosen, the digipeater will capture the frequency every time it has
data to send since digipeated packets are sent without this delay.
Resent observations have proven that a better algorithm for avoiding collisions between end-user
stations, while still allowing digipeaters the high-priority access they require is achieved using per-
sistence and slottime to determine proper transmit intervals and setting DWAIT to 0.
See also: persist, slottime
Echo
ON| OFF
default ON
All Units
All Modes
When ON, characters received from the computer by the TNC are echoed back and displayed. If
you are receiving double print of letters entered at the keyboard, turn this command OFF. This cor-
responds to the settings in your terminal program for duplex. If your program is set for full-duplex
set ECHO ON. If your program is set for half-duplex (some call it echo) then set ECHO in the TNC
to OFF. Regardless of the setting of this command, the TNC will not echo an X-OFF or X-ON char-
acter to the terminal when it receives a STOP or START character. Echo is disabled in Transparent
Mode.
