Mondial House: IRS
Mondial IRS
The International Repeater Station (IRS) in Mondial was both the largest in Europe and the largest that had been commissioned by British Telecom.

Scan: Mondial IRS - a page from the BTI brochure (1984).
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Mondial IRS
Mondial
IRS
Mondial IRS was the International Repeater Station on the main part of two floors.

Every circuit into and out of Mondial passed through the IRS. A total of 38,980 circuits capacity was available in 1984. Most of the audio transmission equipment was supplied by STC. Channel translation equipment for inbound and outbound signalling was delivered by Plessey. FDM and TDM transmission equipments were supplied by GEC.
Mondial IRS, TJFs
The towering sections of the Test Jack Frames reflect the massive scale of the cavernous Repeater Station.

Photo: Mondial TJFs, courtesy of'Youngleavers'.
HF, Plug and Test
Mondial IRS showing a wide bay of Plug & Test equipments, still in the 'Light Straw' era.




Photo: High Frequency, Plug & Test, courtesy of 'Youngleavers'.

Design, images and text compiled by © Light-Straw. With thanks to 'Youngleavers'.
Page last updated June 2015 revision. Checked May 2021.

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