[GreenKeys] A noteworthy date in Teletype history

[Don Robert House]

101A, 101B were the only data sets used on five level machines.  The  
M33 and M35 used 101C and 105 data sets.
The 33 and 35 were not involved in the cutover as they were installed  
as dial machines.
The 101D was built by General DataCom and sold to the General  
Telephone System and other independent telcos.
The 101D was not used by the Bell System.  BTW I have never seen a  
101D that worked.
As far as I remember the cutover key... was a 6017 series and was  
installed externally to the data set.

Don


On 31 Aug 2012, at 8:09 AM, <gil at baudot.net> wrote:

That's cool.  What switch under the 101 data set?  I need to look at  
my newly acquired 101C (thanks again Wayne), and the broken 101D  
that's around somewhere.

gil


gil smith
greenkeys moderator
gil at baudot.net
www.baudot.net
Vaux Electronics: 480-354-5556



-------- Original Message --------
Subject: [GreenKeys] A noteworthy date in Teletype history
From: gfmurphy at earthlink.net
Date: Fri, August 31, 2012 1:22 am
To: Greenkeys <greenkeys at mailman.qth.net>



Greenkeyers:

Today is a noteworthy date in Teletype history. 50 years ago today, on  
August 31,
1962, all 60,000 TWX machines in the US switched from manual service  
to dial service.
For the subscriber, all that had to be done was to turn a switch  
located underneath
the 101 data set. The switch-over was done at the end of the business  
day. Then
as now, August 31 was the Friday before the Labor Day weekend. The  
Bell System gave
themselves the 3 day holiday to work out the inevitable kinks in the  
cutover.

Jerry Murphy


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