Lantronix M110 Series User Guide - Page 13

Communication with the Modem After all the above setup, communications between the terminal equipment and the modem can now be tested, AT commands can be sent to the modem using a terminal program (i.e. Tera Term) installed on computer for configuring the modem. 7.1 Communications test • Connection between the terminal equipment and the modem can be made using two types of cables; RS-232 DB-9 Serial cable or USB Type-C cable • Configuration of the RS-232 port on the terminal equipment/program should initially be; Baud-rate: Data bits: Parity: Stop Bits: Flow control: 115,200 bps 8 None 1 None • To see if the communications between the terminal program and the modem was established, enter: AT and modem will respond with: OK 7.2 Echo Function The default echo setting is off/disabled (ATE0), to enable the echo function, either; • Enable "Local echo' in terminal program or • Enable the modem echo function (enter ATE1) In M2M application, it is highly recommended to disable the modem echo function (enter ATE0) to avoid unnecessary traffic between DTE and DCE. In terminal program, if respond is not displayed after an AT command is entered, recheck the above setting. If communications cannot be established with the modem, check; • The RS-232 physical connection • The RS-232 configuration M110 Series User Guide 13