What’s the difference between ADSL2+ and ISDN?
Both ADSL2+ and ISDN use the copper wires that connect you to your local exchange (sometimes known as ‘the last mile’ or ‘the local loop’), but an ADSL2+ line provides a digital service over the same line and at the same time as your analogue service (without interfering with it), while an ISDN line provides only a digital service (but this can be ‘converted’ to analogue by your terminal equipment or highway wall box for voice calls).
