MONDIAL HOUSE once home to Mondial TXK2

Mondial ISC (1980)

Mondial TXK2 was introduced in 1978 at Mondial House, Upper Thames Street – the building was very late – it had originally been intended to install the Stag Lane units here. Instead Stag Lane (an old aircraft factory) was used. The Mondial TXK2 of around 5000e employed a different version of K2 technology than Wood Street and DeHavilland. It used separate signalling sender-receivers and didn’t have the curious outgoing side registers formerly employed. Later in its life, BT developed a computer controlled replacement for the coders, which handled the translations and routing information.