Step By Step and Crossbar Technology - Heritage PDF Files
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The History of Telephone Switching Technology in Australia
Here in it's entirety, Telecommunications Monograph No. 5 as originally authored by AH Freeman. The definitive document for
anyone studying the story of analog telephone exchanges in Australia.
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Crossbar Switching - October 1961
A fairly simple document outlining the changes to the network that saw Crossbar enter the network. Covers some of the more intricate issues of makig Crossbar and SxS work together.
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Pitt Exchange 1974 - Strowger SxS gives way to Crossbar ARF
An engineering report on the complexities of replacing a very old pre 2000 type exchange in the heard of Sydney with ARF Crossbar.
The project is a snapshot of the kind of network activity that heralded the 1970s - and a showpiece of what Crossbar coul be conjoled
to do
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Post Dialling Delay - What is it?
Anyone old enough to remember the telephone network in the 1980s and 1990s would remember that there was quite often a long
delay between the last number dialled - and actually being connected to the other end. Such was the sphagetti web of calls making their
way through Step by Step, Crossbar and Digital switches.
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ARE11 System Appreciation
Speak to anyone who worked in the system in the 1990's and it would be hard to come across anyone who could say they "appreciated" ARE11 Crossbar. But 20 years earlier it was the answer to a lot of problems that ARF102 left us. If it wasn't for ARE11, the
network would have collapsed altogether in the '80s.
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Elsternwick ARE11 Exchange
The first ARE11 exchange in Australia.
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Converting a working ARF102 exchange to ARE11
The true power of ARE11 was in being able to convert the massive metropolitan ARF Crossbar machines, installed only a decade before, to computer control without having to actually replace the bulky switches themselves. ARE11 was part of a long lost world of
engineering where to replace, wasn't always the most economic option. Especially when AXE and Digital was just around the corner.