WE 801C/801CR Automatic Calling Unit mountings

[rcourtney]

I was able to locate two 801C/801CR ACU cards and the M15H dataphone cable.

I hope to find a mounting cage either single 52Al data mounting or a rack 40A for 4 ACUs paired with 4 Dataphone / datasets.

Need the cases or schematics.

Will be making a RS366 USB interface and modifying Linux CU to make calls.

[5415551212]

Nice find there is a old thread on data phones here:
https://www.classicrotaryphones.com/forum/index.php?topic=13309.0

In this era of reviving vintage gear it would be interesting to make a 'open source' RS-366 adapter PCB design if nobody has made one ?
could be USB as you mentioned or a pcie X1 card.
I imagine you'll need to design a custom interface for RS-366 signaling?
Possibly its just RS-232 signal levels so this could be done with two Max232 chips for level shifting and a microcontroller such as a Arduino.

Promptus made a ISA card for RS-366 that appeared to use a Intel 82C55A there is one on ebay:
https://www.ebay.com/itm/200908957149
but that card likely predates Linux and Windows.

You could find (now archived) info on RS-366 here:
https://web.archive.org/web/20111014022200/http://www.interfacebus.com/Design_Connector_RS366_Interface.html

[rcourtney]

Western Electric made alot of great products.
I will be using FTDI's FT232H and "bitbang" the level shifted lines.

Current Linux CU command just prepends "ATD" to the number to dial.

I will additionally creating the serial interface to work properly with 212AR Dataphone's HS high speed (1200 baud) controls.

[rcourtney]

52A type mounting needed or the schematic.

[rcourtney]

Did figure out the mounting circuit used in the 52A data mounting.

Still need an enclosure.

[5415551212]

Did figure out the mounting circuit used in the 52A data mounting.

Still need an enclosure.

Nice diagram!

[rcourtney]

Slowly getting the board designed.

[rcourtney]

Almost ready to send off to have the circuit board made.

[rcourtney]

Working on a USB to RS232 / RS366 serial interface for my 212AR dataset and 801CR ACU.

It will support the pre-Hayes handling of speed and calling.

[5415551212]

Nice does the adapter use the  FT232H?

Will you publish your design some place like github?
Cheers
--Stephen

[rcourtney]

It most definitely does use the FT232HL.  When used for the 212A, one additional input is bit banged.  801C 9 lines are bit banged.

I will post the project here and on github.  I use Linux but time permitting add MacOS or Windows support.

[rcourtney]

Making headway on the USB interface for the 212A modem and 801C ACU.
Looks like it will all fit in the DB25 shell.

[rcourtney]

PCB finally arrived!
The ovals are because the circuit pack edge connector for the original
and modern EDAC are slightly wider.

This interface connects power and breaks out the telco and RS366 connections.

[rcourtney]

RS232/RS366 boards arrived.

Trimming and soldering tiny parts onto the boards are next.