Network Access Device

A Network Access Device (or NAD) is an electronic circuit that automatically connects a user to a preferred network. More generally, a NAD is any device that, when connected to, provides access to a larger communication network of some sort. A Network Access Device (or NAD) is an electronic circuit that automatically connects a user to a preferred network. More generally, a NAD is any device that, when connected to, provides access to a larger communication network of some sort. Within the telecommunication industry, a NAD will be connected to a user's telephone. When the user dials a number, the NAD will 'listen' to the dialled digits and reroute the call through a network that will provide the best rates for the destination of the call. The NAD is often referred to as a dialler, predictive dialler or least cost routing dialler.