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MNDX No. 341, Serial 72 830 0042. |
MNDX341 was recovered from Teradyne of Bracknell in 1997 by Martin Loach who has restored it to an original condition. The unit was built as a 400 line exchange, but was modified by Teradyne to work as two separate exchanges communicating with each other via a simulated Group Switching Centre (GSC) using DC2 and PCM signalling. The mobile was kept inside an industrial unit for eight years prior to it being rescued, so the bodywork was in excellent condition.
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Transferring to the low-loader outside Teradyne. With an overall height of more than 12 feet, it wasn't as easy as you might think! |
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Identifying the various and sundry items, rebuilding the battery boxes and getting the first aid kit just right took plenty of time and patience. |
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Meters on the left, rows and rows of selectors, and relay sets galore! Collector's dream or maintenance man's nightmare? Checking out the wiring and finding the correct diagrams was a massive task! |
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You can see more of Martin's photographs on The Strowger Appreciation Site.
Later (2016) photos of MNDX No. 341.
Teradyne
Teradyne had used the MNDX 341 for training and field testing of equipment that they re-designed to BT specifications. SCOT - the Stepper Central Office Tester (American in origin) was deployed in many Strowger exchanges to enable remote routine testing of equipments. The fact that SCOT could be configured remotely and also report back any problems over the same access gateway made it particularly suitable for testing unattended exchanges, especially UAX13s and SAXs. Another test product was 4TEL and it's no wonder that Teradyne are continuing as suppliers of test equipment to the industry.
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