yeah these are AUI terminators, for ethernet.
isildur

On Tue, 1 Jan 2002, Peter Hufnagel wrote:

> I have 5 DEC...umm, terminators I guess, of some
> sort... 15-pin 'D'-shell type connector, male, with
> only 6 pins in it, and a green LED on the outside,
> DEC P/N 12-22196-01.
> 
> Anyone know what they are?  
> Anyone have a use for them?
> 
> Pete
>