3 Jul
2015
3 Jul
'15
1:48 p.m.
I do difficult propositions, including prying pdps away from the cold
dead hands of the British ministry of defence! So tell more? You can
reach me off-list at this address.
I had been told that the System/7s were part of the billing system,
rather than the switch itself. My info may be defective, but that's
what I was told; one per exchange. I believe I have some doc referring
to that application.
Mike
On Thu, Jul 2, 2015 at 11:33 PM, Christian Gauger-Cosgrove
<captainkirk359 at gmail.com> wrote:
On 2 July 2015 at 17:39, Mike Ross <tmfdmike at
gmail.com> wrote:
--
http://www.corestore.org
'No greater love hath a man than he lay down his life for his brother.
Not for millions, not for glory, not for fame.
For one person, in the dark, where no one will ever know or see.'
Take the IBM System/7. Successor to the 1800,
succeeded by the
Series/1. They were *ubiquitous* - one in every telephone exchange in
the USA, I've heard. They even made a special ruggedised version for
Being
into telephony, I can say that I've not heard anything about IBM
System/7 machines being used in exchanges. I do know that the WECo ESS
exchanges did, of course, have computers. But the ESS exchange
computers were custom systems and architectures built by Western
Electric.
The 1ESS/1AESS computer architecture is however, nearly completely
extinct. There are, I believe, only two 1ESS/1AESS switches left. One
is a partial, and non-functional exchange at the museum of
communications in Seattle; the processor is complete, and it has one
of each requisite switching frame, but it can't be used as they need
to recompile the software that runs it (which isn't possible as
they're lacking the crucial internal compiler that ran on WECo's IBM
System/3x0 machines). The other 1ESS/1AESS switch is a complete and
functional unit, still in service, last I heard. But there are plans
to scrap it and put in a modern switch in its place. Saving it would
be a difficult proposition, to say the least.
Regards,
Christian
--
Christian M. Gauger-Cosgrove
STCKON08DS0
Contact information available upon request.