Yaesu FT2DR Instruction Manual page 9

(1)
Connected to the local node, but unable to connect
to Internet nodes or rooms (never before established
connection to Internet nodes or rooms)
(2)
Connected to the local node, but unable to connect
to Internet nodes or rooms (previously succeeded in
establishing connection to Internet nodes or rooms)
(3)
Connected to the local node, successfully connected
to an Internet node or room (the Internet node or room
is the same as the one most recently used)
(4)
Connected to the local node, successfully connected
to an Internet node or room (the Internet node or room
is different from the one most recently used)
Connecting to a Faraway Station Using WIRES-X
9