[GreenKeys] data speed tape reader? is it data phone too?
COURYHOUSE at aol.com
COURYHOUSE at aol.com
Tue Dec 13 11:42:36 EST 2016
Jim at SMECC we have a 202 that looks like the 103... sort of an
elongated gray phone. We are in need of a 103 so we can run at 110 and 300
baud.
On the Dataspeed .. We have a Mtn. Bell Service manual - "Dataspeed
printer and magnetic tape terminal"
which refers to bell system practices section 578-300-200 issue 3 - march
1973 for some tech stuff,,, and 578-300-110 issue 3 - march 1973 for a
general disc. for the magnetic tape transport.... Perhaps this tape
system is a replacement for the punched tape system? It seems to send and
rcv... It also has 2 versions one for use with 33/35/37 and one to
work with CDT.
I imagine there are whole sets of practices that embrace this thing
maybe moreso than this book..
Since it has Dataspeed ink printer it gave me a look at the innards of
that.
Ed# _www.smecc.org_ (http://www.smecc.org)
In a message dated 12/13/2016 9:08:58 A.M. US Mountain Standard Time,
jhhaynes at earthlink.net writes:
First of all, there was a family of DataPhone data sets and auxiliaries
which looked like telephones having a dial and a handset, but were gray
and had pushbuttons above the dial. I'm gonna leave it to you to look
for pictures of same. AT&T put out some booklets called Technical
References for the whole family of these. There was the 103 series
that was interoperable with the 101 series, but were small desktop
things. The 200-series were higher speed things - 202 up to 1200 baud
as I recall, and 201 up to 2400 baud synchronous. There was a 300
series that was for up to 56K baud I think, and the 400 series included
things for TouchTone signals and perhaps for a fax modem as well as the
ones used for Type 5 Dataspeed. Dataspeed was an AT&T word, so Teletype
called it Telespeed if sold for the non-AT&T market.
The transmitter data set for Type 5 was quite small, all contained within
the telephone-like housing, since there was nearly nothing to the circuit
except a pair of transistors and nine sets of resonators. The receiver
data set was large, in a cabinet maybe 15"x10"x10" and required what
was called an 804 Data Auxiliary Set, which was really just a telephone
styled like the other modems of the family. There was also an autodialer
that could be used with these modems, but came in a separate box full
of relays.
I left Teletype in 1966 and I think the Type 5 Dataspeed was just going
into production then. The transmitter design was essentially finished
earlier, but the receiver with DRPE and a new DRPE driver circuit took
more time.
I don't recall if the Inktronic printer carried the Dataspeed name in
AT&T service.
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