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MTX-Tunnel features a small Telnet server. If enabled, you can remotely access MTX-Tunnel with any Telnet client. It is recommended to use Telnet to access MTX-Tunnel remotely; it is faster and effortless compared to WebServer.
To access MTX-Tunnel Telnet, open the MSDos console in your PC and specify the IP address obtained by MTX-Tunnel. DNS can be used instead if DynDNS has been activated. You can also use the freeware Putty to connect via Telnet.
In the following example the default screen will be a LOG IN prompt.
After the user and password are checked you can send AT commands to MTX-Tunnel. These commands can be modem standard ones or special ones, like to check network coverage with AT+CSQ command, etc.
Or to check the modem’s configuration with the command AT^MTXTUNNEL=GETCONFIG
Or to change a remote configuration, like the speed of the serial port COM1 (specified in COMM_baudrate) to 115200 instead of 9600, for what we will use the command AT^MTXTUNNEL=SETPARAM,…. and the command AT+CFUN=1,1 for a remote reset.
There are many AT commands that can be executed remotely. Check the AT Commands section.
To use Telnet it is recommended to avoid the standard port 23 if you are using MTX-Tunnel on a public network (Internet). The reason is because of the dense traffic generated from other addresses to said port (to random IPs). It is recommended to use the port 20023 for Telnet, for instance.
Remember that the implemented Telnet has several posibilities, from the standard way (username and password) to OTP (One Time Password) that generates a different password for each session. Check the guide (TELNET_ parameters) for more information.