TNC2xx Command Summary

Since TNCs of the TNC2xx family are widely spread these days we have compiled a summary of the most important commands these devices will "understand" in the following paragraph. These commands may be helpful in a variety of situations, e.g. when the TNC runs crazy you will appreciate to know how to reset the device and clear all awkward software debris which may have been stored in its RAM. TurboLog 4's TNC Terminal is ideally suited to set your device to order.

The following notations are used to describe the commands:

[ ]    denotes data options which are not mandatory.

( )    includes the default value.

*      marks commands which can be applied individually on different logical channels.

The following commands are specified:

A (1)

Auto line feed command

0 = Auto line feed turned off  

1 = Auto line feed turned on

C     Call1 [ Call2 ... Call9 ]

Connect command, including the routing sequence.

D

Disconnect command.

E (1)

Commands the echo

0 = character string echoing turned off.

1 = character string echoing turned on.

*F (4)     1 ... 15

Frame acknowledgement time in seconds

G

[0]     Get information in Host mode.

[1]     Get status in Host mode.

H (0)

Show Heard list

0 = Turn off update of Heard list.

1 = Turn off update of Heard list.

2 = Delete Heard list.

n = Command max. number of calls in Heard list.

*I

Set/Get call.

JHOST (0)

Command Terminal Mode.

0 = Activate Terminal Mode.

1 = Activate Host Mode.

K (0)

Show stamp and Date/Time.

0 = Stamp off.

1 = Stamp status messages on.

2 = Stamp status and monitor messages on.

DD.MM.YY  = Set date, European standard.

MM/DD/YY  = Set date, American format.

L       [ 0 ...4 ]

Status of channels.

M ( IU )      NIUSC+-

Monitor mode.

N = No

I  = Information

U = Unprotocolled

S = Status ( Control packets )

C = Monitor even if connection exists

+ = Only packets from/to distinct staion(s) ( max. 8 )

- =  No packets from/to distinct staion(s) ( max. 8 )

*N ( 10 )        0 ... 255

Number of attempts ( 0 = unlimited ).

*O ( 4 )          1 ... 7

Number of unconfirmed packets.

P ( 64 )          0 ... 255

P-Persistance value.

QRES

Reset, new start of TNC firmware.

R ( 1 )

Digipeater function.

0 = Digipeater off.

1 = Digipeater on.

S ( 1 )            0 ... 4

Select logical channel ( 0 = unprotocolled ).

T ( 30 )           0 ... 127

Time delay from PTT to data ( in 10ms ).

U ( 0 )            [ Text ]

0 = No unsupervised traffic.

1 = Unsupervised traffic.

*V ( 2 )

Protocol version.

1 = Protocol version 1.

2 = Protocol version 2.

W ( 10 )          0 ... 127

Time slot for P-Persistence ( 10 ms ).

X ( 1 )

PTT for transmitter.

0 = PTT for transmitter disabled.

1 = PTT for transmitter enabled.

Y ( 1 )             0 ... 4

Max. number of connections.

Z ( 3 )

Hardware handshake control.

0 = Flow is off ; Xon/off is off.

1 = Flow is on ; Xon/off is off.

2 = Flow is off ; Xon/off is on.

3 = Flow is on ; Xon/off is on.

@ B

Show number of free buffers.

@ D ( 0 )

Full duplex operation.

0 = Full duplex is off.

1 = Full duplex is on.

@ K

Turn TNC into KISS mode.

@ S

Instantaneous link status.

@ T2 ( 100 )      0 ... 255

Timer T2  ( 10 ms ). This is the time allowed for the acknowledgement of a received packet. allows to confirm more than just one received packet by means of one acknowleledgement.

@ T3 ( 18000 )   0 ... 32767

Timer T3  ( 10 ms ). This is the time the TNC will wait for an alive signal from a connected station. If T3 is exceeded the TNC will request the partner to send a receipt of connection. If he does not respond the connection will be disrupted automatically.

@ V ( 0 )

Call check

0 = Call check turned off.  

1 = Call check turned on.

This topic was last edited on  Monday, 03-Jul-2023,  at  23:57