[GreenKeys] RCA teleprinter ad on EBAY 381052171359 trans-atlantic

[Ed Sharpe Archivist for SMECC via GreenKeys]

Lester, Doug and Jim and  anyone else interested!
 
the  data gathered on this   I have  posted at
 
http://www.smecc.org/rca_teleprinter_service.htm
 
If anyone  finds ay additional  data or  anything else in  any way related 
to RCA teleprinter service I am happy to add it to the resource  page.
 
thanks Ed Shape Archivist  for SMECC
 
 
In a message dated 11/14/2014 1:23:43 P.M. US Mountain Standard Time,  
lester at veenstras.com writes:

The  details and history are here, as  usual:

http://en.wikipedia.org/wiki/ARQ-M


Lester B  Veenstra  MØYCM K1YCM W8YCM
lester at veenstras.com

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-----Original  Message-----
From: GreenKeys [mailto:greenkeys-bounces at mailman.qth.net] On  Behalf Of
Jones, Douglas W
Sent: Friday, November 14, 2014 9:20  AM
To: GreenKeys via GreenKeys
Subject: Re: [GreenKeys] RCA teleprinter  ad on EBAY 381052171359
trans-atlantic


On Nov 14, 2014, at 7:53  AM, Ed Sharpe Archivist for SMECC via GreenKeys
wrote:

>  RCA  teleprinter  ad  on EBAY 381052171359 Trans-Atlantic radio  teletype
with  error correcting TEX unit... more  info on this  ?  if anyone buys 
this
scan  it   for all of  us!

I did a google search on fragments of the text and it came up  with
this:
--  http://books.google.com/books?id=mdgDAAAAMBAJ&pg=PA239

That is,  Popular Mechanics, September 1950, page 239.

Sounds like parity for  error detection with some kind of
ENQ-ACK flow control with NAK used to  request retransmission?
Hard to tell from this kind of ad, but definitely  some kind
of error correction protocol.

The resolution of Google's  scan of the ad is about twice
than the resolution of the scan quoted from  E-bay.

Doug Jones
jones at cs.uiowa.edu
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