BT Highway was a UK retail ISDN2e service from British Telecom which was announced in November 1997[1] and withdrawn in February 2007.
BT Highway was provided as a wall-mounted panel that supplemented an analogue master socket.
Unlike an analogue master socket, BT Highway required external power from a mains electric adaptor.
Later versions of BT Highway provided a USB port which PCs could connect to; a driver CD was supplied and the device was seen as an ISDN modem by Windows.
[5] BT Highway was announced in November 1997[1] and introduced on an exchange-by-exchange basis starting in September 1998.