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CSE-H53N User Manual Ver. 2.2
- 38 -
http://www.ezTCP.com
Termination of online status – entering the AT command mode
Figure 5-9 time chart
Points
States
~
TCP connection is on-line.
①
The mode is changed to “command mode” after receiving
“+++”.
~
command mode (TCP connection is off-line)
②
CSE-H53N sends FIN segment right after the “ATH” arrives.
~
Processes of TCP disconnection
③
TCP connection is terminated
~
CSE-H53N sends “NO CARRIER” with disconnection
Table 5-13 states of each other
CSE-H53N changes the mode to AT command, when receiving “+++”. In this state, the
communication with remote host is unavailable because CSE-H53N processes only AT
commands. Whenever you want to go back to on-line state, just give “ATO” command.
Refer to the [ATC mode] document on our website for details.