KA-NODE
24
ample, if you connected to LAW with W0XI, LAW connected (via your request) to KC with WX0XI-
15. This is automatic. At this point, you could connect to another KA-NODE, some other network
node using AX.25 as an uplink or downlink protocol, or to an end-user. Let's assume that you de-
sire to connect to N0APJ. So, just enter in response to the node "enter command" above:
C N0APJ Stay
and you'll get the response:
###LINK MADE
You are now connected to N0APJ. If you have issued a connect command to a KA-NODE and real-
ize that you have made a mistake with he call or for any other reason wish to cancel the connec-
tion, you may do so by using the ABORT command. In order for the abort to work, it MUST be the
first word entered following the connect command and must be spelled out entirely. For instance,
if you tell the KA-NODE:
XC KB5EEG
and then decide to abort the connect, your next entry must be:
ABORT
Any other entry will cancel any possible abort of the connection and you must wait for the
KA-NODE to retry out.
Local Acknowledgments, Higher Throughput
Now that you are connected to N0APJ, you can carry on a normal Packet QSO. While everything
appears "normal" and AX.25 compatible, acknowledgments to your packets are generated by the
KA-NODE directly connected to you. Each channel in the link takes care of its own errors. In other
words, the link between KC and LAW handles its own error checking. In this way, one weak line
will not cause end-to-end packets and acknowledgments to be repeated as they would with digi-
peating. The result is substantial improvement in throughput for connections using nodes.
When it comes time to disconnect, you do so in the standard AX.25 manner. To disconnect the link
described above, type Ctrl-C, obtain the cmd: prompt on your TNC and issue the disconnect com-
mand:
cmd: D
***DISCONNECTED
You'll get the usual disconnect message from your TNC as noted. If however, your distant partner,
in this case N0APJ, disconnects the link, you'll see the following:
###DISCONNECTED BY N0APJ AT NODE KC
ENTER COMMAND B,C,J,N,X, or Help
?
Automatic Disconnect
If a user abandons a connection to a KA-NODE, or a link between two KA-NODES without discon-
necting and there is no activity through the link for a specified period of time (see KNTIMER), the
node will initiate a disconnect.
To Next Page
Loading...
