What was a Terminal Concentration Device in DEC's products?

[Paul Koning]

> On Jan 30, 2022, at 4:44 PM, John Forecast via cctalk <cctalk at classiccmp.org> wrote:
> 
> ...
> Is it possible that the DMX11 was a CSS product?

Clearly it is; the Option/Module list (1983 edition, from Bitsavers) says so.  It shows the controller and three different 64 port line units, for different signal specs ("differential" presumably RS-422, "EIA" presumably RS-232, and 20 mA current loop).

	paul