Travel with a periodic ticket on t:card
On green city buses and trams in the Trondheim area, just go on board and take a seat. In case of a ticket inspection, the inspector will see if you have a valid ticket.
On regional buses, you board in the front by the driver and validate the t:card on the card reader.
Travel with punch card on t: card
When you validate the t:card on the card reader on board, the driver will see that you have a punch card and start a single ticket. Hold the card against the card reader until the driver confirms that you have a ticket. Keep track of how many single tickets you have left by logging in to the webshop or asking the driver.
When you validate on the card reader at a metro station, wait for an audio signal and a picture that shows that the ticket is OK and how many tickets you have left.