IDTVs
ONdigital and ITVdigital could also be received with an Integrated Digitial Television (iDTV) receiver. They used a Conditional Access Module (CAM) with a smart card, plugged in to a DVB Common Interface slot in the back of the set.
Purchasers of iDTVs were given a substantially discounted price on using the ONdigital service, as there was no cost for a set-top box.
Some of the original iDTVs needed firmware upgrades to work with the CAM. For example, Sony sent technicians out to homes to make the necessary updates free of charge.
Read more about this topic: ITV Digital