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Mondial ISC was a 'full-facility' TXK2 Crossbar switch, which was provided by Plessey Telecommunications Ltd. |
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Mondial ISC |
Mondial ISC was the International Switching Centre which occupied the entire fourth floor and part of the third. |
"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. 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."
With thanks to Peter Walker.
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