Standard Models: 32-ASR, 32-KSR, and 32-RO
The Teletype Corp Model 32 was offered in Receive-Only (RO),
Keyboard-Send-Receive (KSR), and Auto-Send-Receive (ASR) versions.
Shown above, is a clean Telex M32-ASR belonging to Dave Ross. The M32 is a ...
|No, it's not an ascii 33, it's a baudot 32, as indicated by a 3-row (not 4-row) keyboard. Most 32 machines seem to be Telex units, which had the rotary dialer and four pushbuttons -- if it had six buttons, or a touch-tone dialer, it will be a TWX machine that has a modem. But I don't know if any 32 units were used with TWX or not. The early TWX used baudot and M15 machines, but later changed to ascii and M33 machines.|
|This is the CCU for the Telex version. I belive this pic, and the next few, are from Dave Wimsatt's M32. I don't think the red/black ribbon is correct -- that would require a dual-color ribbon shift mechanism.|
|There's a lot more electronics than earlier machines.|
|Function options installed in this area.|
|The blue plastic paddlewheel is the "answer-back" drum -- you break off tines (or not) to code the characters, and program it with an ID string for your machine. The drum code can be read remotely.|
|This is the Telex dialer -- it does not dial phone numbers, but rather some sort of station ID that is selected via a central Telex switching office.|
|Telex machines used a special wired network, and a polarity-reversing current loop. To hook one up today, you either need to build a special box to emulate a Telex central office, or tap into the internal 20-mil current loop in the CCU at the selector driver board.|
|This 32 is a private-wire 20-mil current loop machine, which is easy to interface to RS-232, using a converter circuit.|