2) Sent/Received port (Port9100 or Port1024)
Host
CONNECT
(Port1024 or Port9100)
CONNECT success
connect
Status request
(Port1024 or Port9100)
Print data
(Port1024 or Port9100)
CLOSE
(Port1024 or Port9100)
CONNECT END
This product
LISTEN
ACCEPT
Printer status
(Port1024 or Port9100)
Print
CLOSE
LISTEN
502