- If the TCP connection is broken the modem will try to reconnect automatically. During reconnection period serial port will go back to command mode, and DSR/DCD signal back to low.

-The setting will be saved, and after power off, the AUTOTCP will be restarted with the 20 seconds delay after power up.

-To stop auto TCP connection, you need to enter the command AT+AUTOTCP=0 within 20 seconds after power up, or during reconnection (serial port back to command mode)

3.2.2AT+IPTCP

Description:

This command specifies the TCP socket parameters and mode that to be used by AT+AUTOTCP command.

Syntax:

Command Syntax

AT+IPTCP=<port>,<mode>,<server>,<TCPTxDelay>

Response syntax:

+ IPTCP: <port>,<mode>,<server>,<TCPTxDelay>

Command

Possible responses:

AT+ IPTCP?

+IPTCP: 0,"S","",100

 

OK

 

Note : show current settings

AT+ IPTCP =23

OK

 

Note: set the TCP port to 23

AT+ IPTCP =23,”C”,202.144.111.222”,100

OK

 

Note: to set the modem to connect TCP socket Client

 

(caller) mode

 

to target :address 202.144.111.222 and port 23

AT+ IPTCP =23,”S”,255.255.255.255”,100

OK

 

to set the modem to wait for TCP socket connection

 

request (Server (listening) mode)

 

any calling IP address allowed, port 23

AT+ IPTCP =?

+IPTCP: (0-65535),("C","S"),(120),(0-32760)

 

OK

 

Note : possible argument

Defined Values:

 

<port>

The port number to be used for the TCP socket connection. Default value is 0. Valid range is 0 to 65535.

Confidential, the whole present document is the sole property of Fargo Telecom (Asia) Ltd.

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