You can also use in the same way as a talk command to a connected user but
without any processing, added of "from <blah> to <blah" or whatever.
+=== 0^PING [argument]^User level link check command
+At the user level, this command allows the user to check that they
+are still connected to a functioning node. If the command is
+issued with no arguments it will return string 'PONG 123' where
+'123' is a node global counter starting at 1. This number cannot
+be relied to run consecutively as it is shared by all users.
+
+If an argument is supplied then the return is 'PONG ARGUMENT'. So it
+you are a client program and you need a counter or some other unique
+string to satisfy yourself that you are not being spoofed, then you
+will need to supply the argument and check that reply is what you
+expect:
+
+ping 23 or ping xyzzy
+
+will return
+
+PONG 23 or PONG XYZZY
+
+respectively.
+
=== 1^PING <node call>^Check the link quality between nodes
This command allows you to send a frame to another cluster node on
the network and get a return frame. The time it takes to do this
SH/SAT AO-10
SH/SAT FENGYUN1 12 2
+=== 1^SHOW/SPOTSTATS^Show the current Spot statistics
+View the current unique spot sentences seen since the last restart.
+
+It shows the number of PC11 and PC61 sentences and the percentage
+of PC11s received of the total of both. It also shows the number
+of PC11s that have been promoted to PC61 before being passed on
+plus a total percentage of incoming PC11 that have been promoted.
+
+A PC11 can be promoted to PC61 by a stored IP address in the routing
+table or it can be promoted by being delayed to a short for any
+passing PC61 from another node.
+
=== 6^SHOW/STARTUP <call>^View a user startup script
=== 0^SHOW/STARTUP^View your own startup script
View the contents of a startup script created with SET/STARTUP.