[GreenKeys] A first look inside the Pasco 35 ASR

[Pete Lancashire]

Added a couple pictures of three of the boards from the 9140 to the album
"35 ASR First Look" , they are at the bottom

https://goo.gl/photos/ia3pxMajyJXu5EeK7



On Sat, Aug 8, 2015 at 12:20 PM, Jim Haynes <jhhaynes at earthlink.net> wrote:

> On Sat, 8 Aug 2015, Jack wrote:
>
>>
>> I am sure Professor Haynes can provide more info.
>>
>> No, you guys from the operating companies know a lot more than I do
> about such things, especially such things as came after I left Teletype.
>
> I'm familiar with the 81D1 just from having studied it in my spare
> time.  There was a selective calling system being made at Teletype
> while I was there - that might have been the 8A1.  I just remember it
> was 8-level and the control station was built into a cabinet similar
> to that of a Model 35 printer.  Had a bunch of lighted lever switches
> where I think the light indicated the outlying station was responding,
> or maybe not responding, and the switch could cause a station to be
> bypassed in the polling sequence.
>
> Then G.E. with the Datanet-30 computer had an application that could
> emulate the station controller of the 82B systems, and store messages on
> disk.  Thus the customer could keep Bell System service for all the
> outlying stations but avoid the cost of the Bell station controller at the
> master station.  And messages could be passed to a computer for
> processing.  IBM and Collins Radio had computers fitting into the same kind
> of system, tho I don't know if they had specifically an 82B- controller
> replacement program.  IBM no doubt preferred to sell systems that employed
> their Selectric typewriter terminals.  Collins was closer
> to the airline industry, so they were probably replacing 81D1 systems,
> as well as the "Developmental Line-Switched" system that Bell did for
> Delta Airlines and later United.  This employed the famous "Delta Set"
> 28ASR with its autodialer and the LFXD tape reader that could pull back
> the tape and resend the message to multiple addresses.
>
> There's a book about Art Collins and his company.  A passage concerns
> their C-8400 communications computer, which was selling very well and
> had customers lining up to buy them.  But Art was having a follow-on
> system developed and thought it would be so much better that he insisted
> they accept no more orders for the C-8400.  I don't know if the follow-on
> C-8600 system ever materialized.  The book goes on to tell how Art
> was obsessed with combining computing and communication and ran his
> company into the ground trying to do it.  His vision was good, but the
> technology wasn't there yet.
>
> ITT also had a communication computer, but I believe it was made for them
> by DEC.  G.E. upper management decided the Datanet-30 was a communication
> product rather than a computer and moved it from the computer department
> in Phoenix to the communication products department in Virginia.  That
> probably finished it off; it was already obsolescent.  And there was to
> be a replacement called Datanet-355 but it was a much bigger and more
> costly product and the market apparently didn't need such a product.
>
>
>
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