Crossbar Switching

Table of Contents

Crossbar Switching

Crosspoint Switching

Link Trunking

Crossbar Switch

Crossbar detail

Crossbar detail

Crossbar detail

Typical Crossbar Trunking

Early History

Reynold’s crossbar switch 1913

Betulander and Palmgren

Betulander/Palmgren research

Televerket Standardisation

Betulander’s crossbar switch 1919

Televerket’s decision

Across the Atlantic...

AT&T’s Crossbar Switch

AT&T Crossbar Systems

#1 Crossbar

L. M. Ericsson Crossbar

L. M. Ericsson Crossbar

Other crossbar systems in 1950s

ITT Pentaconta switch

Other Crossbar Systems

Crossbar in the UK

Crossbar in the UK

The ATE/Plessey 5005 System

The ATE/Plessey 5005 System

TXK1 Exchange

Review of PO Crossbar Systems

TXK1 Local

TXK1 GSCs

TXK1 SSCs

TXK2 ISCs

TXK3 Local

TXK4 Transit

TXK5 ISCs

TXK6 ISC

Code Switch

UK Crossbar

Coming soon...

Return to
THG Contents

Peter Walker Index

Acknowledgements:-

Peter Walker was Director of Technology for OFTEL (now OFCOM), the UK's Telecoms Regulator.  

All copyrights respected and acknowledged. The use of proprietary names and images is made hereby for the purpose of academic review, within the "fair use" provisions of the Copyright, Designs and Patents Act 1988, and no infringement of third-party rights is either intended or indeed made.

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