When activated, the smart meter will communicate remotely with ESB Networks over a secure 2G network using technology like that used to send text messages. Your meter will create the equivalent of an encrypted text message and send it to an IT system called a Head End System (HES). This data is then stored securely in a central Meter Data Management System (MDMS) managed and operated by ESB Networks.
Each day, normally around midnight and via a secure 2G mobile network, your meter will send ESB Networks the total amount of electricity consumed over the previous 24 hour period. Each smart meter will activate itself approximately every two hours to check its integrity and connection to the network, if it finds any problems it will create another encrypted text message and send it to us.
This information has been extracted from ESB Networks and more can be found here.