Tunnel – Configuration Parameters Related with COM2: “COMM2_”

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Configuration parameters starting with the “COMM2_” prefix references the secondary serial port on MTX-Terminal modem. Check the hardware manual of the MTX device to know which is the secondary serial port.

This port is normally used to send AT commands to the terminal modem, so you can request network coverage or another MTX-Tunnel parameter configuration, etc.

This port can also be used to create another GPRS-serial tunnel gateway so you can control 2 devices with one terminal modem and one MTX-Tunnel application. See the Annex to see an example.

COMM2_baudrate

Description: Serial COM2 port speed baud rate.

Possible values:

  • 460800, 230400, 115200, 57600, 38400, 19200, 9600, 4800, 2400, 1200, 600, 300
  • Default value: 115200

Additional notes:

  • Configuration of the device connected to the modem and MTX-Tunnel must be same

COMM2_autorts

Description: This parameter configures the COM2 serial port to have hardware flow control (RTS line). If enabled (value=”on”) hardware flow control will be used; otherwise (value=”off”), no hardware flow control will be used.

Possible values:

  • on, off
  • Default value: off

Additional notes:

  • Configuration of the device connected to the modem and MTX-Tunnel must be the same
  • Use the same value in the COMM_autorts parameter
  • This parameter can only be used in the MTX-IND terminals the rest of the models do not have flow control available in the secondary port

COMM2_autocts

Description: This parameter configures the COM2 serial port to have hardware flow control (CTS line). If enabled (value=”on”) hardware flow control will be used; otherwise (value=”off”), no hardware flow control will be used.

Possible values:

  • on, off
  • Default value: off

Additional notes:

  • Configuration of the device connected to the modem and MTX-Tunnel must be the same
  • Use the same value in the COMM_autorts parameter
  • This parameter can be used only in the MTX-IND terminal modems. Other MTX-Terminal modems do not have flow control in the second serial port

COMM2_bitsperchar

Description: COM2 serial port number of bits per character.

Possible values:

  • 7, 8
  • Default value: 8

Additional notes:

  • Configuration of the device connected to the modem and MTX-Tunnel must be the same
  • This parameter can only be used in the MTX-IND mdoem terminals. The rest of the models do not have flow control in the secondary port

COMM2_stopbits

Description: Number of stop bits per character in COM2 serial port.

Possible values:

  • 1
  • Default value: 1

Additional notes:

  • Configuration of the device connected to the modem and MTX-Tunnel must be the same
  • This parameter can only be used in the MTX-IND modem terminals. The rest of the models do not have flow control in the secondary port. From version 7.27, 2 bits of data can be specified. 2 bit data communications can be slower than those of 1 stop bit, especially with large volume data communications. 1 stop bit is recommended when possible

COMM2_parity

Description: Parity used in COM2 serial port data communication.

Possible values:

  • none, odd, even
  • Default value: none

Additional notes:

  • Configuration of the device connected to the modem and MTX-Tunnel must be the same
  • This parameter can only be used in the MTX-IND modem terminals. The rest of the models do not have flow control in the secondary port