In order to use the SMS feature, your controller must be connected to a GSM modem. To enable the controller to use the GSM modem, select the 'Use SMS Messaging' option shown below. This causes the controller to turn on SB 180, Initialize GSM Modem, at power-up.
M90/91 default GSM modem settings are: 19200, 8 data bits, no parity, 1 stop bit. You may need to manually change your modem's communication settings to match these parameters.
If your GSM modem requires a PIN code to connect to a GSM network, enter it as shown below.
Select this option to prevent the controller from receiving SMS messages from any number not listed in the SMS phone book.