GSM dialers use mobile phone networks and text messages to communicate. You need to buy a SIM card to insert into the GSM dialer, which is connected to your alarm system.The GSM dialer can either call or send a text message to the numbers that you have programmed into it. It will transmit the voice or text messages that you set up.
Pro’s
- Connected via the mobile phone network so no need for a special telephone line or line rental
- Cheap to run as it only dials out when the alarm goes off
- The GSM dialler unit is relatively cheap to buy
- Good if you don’t have a landline or don’t want to rely on one in case it’s cut