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Help us rebuild a TXK1!

One of our long-term goals is to try and rebuild a 5005A (TXK1) local exchange Crossbar system. We already have a complete set of circuit diagrams in our archives, and several other Plessey/ATE publications detailing the design of the system, but we'd like your help. If you worked on the TXK1 (or TXK2!) then your knowledge is invaluable. Furthermore, if you know of any disused TXK1 equipment which has never been recovered, please let us know, so we can approach BT about it. We need to know where it is!

TXK1 overview architecture diagram

Overall architecture diagram

One of the best ways for newcomers to get their heads round the system is a diagram showing how it all fits together. This is an SVG file which you can download, edit and send back to us. Please take a look and point out any mistakes, or fill in the blanks!

SVG files can be edited with Inkscape, a free open source vector graphics program.

ATE Type 5005A document Type 5005 Crossbar System document Maintenance and Operation manual Equipment design document ATE Crossbar switch document
Post Office Educational Pamphlet 3/13

Printed documents

Broughton Crossbar Telephone Exchange — ATE Type 5005A. CMT Asset ID 70.

Type 5005 Crossbar System. CMT Asset ID 77.

Maintenance and Operation of the 5005 Crossbar System. CMT Asset ID 202.

Type 5005 Crossbar System — some aspects of equipment design. CMT Asset ID 203.

ATE Crossbar switch. CMT Asset ID 70.

Plessey 5005A (TXK1) full circuit diagrams (needs cataloguing and filing in diagram number order). CMT Asset ID 53.

Operation of the TXK1 Local Exchange Crossbar System (Post Office Educational Pamphlet Telephones 3/13). CMT Asset ID 92. We'd like a copy of the one that goes with this, EP 3/12, if anyone has it.