Mystery box

[Director]

> -----Original Message-----
> From: cctech-bounces at classiccmp.org 
> [mailto:cctech-bounces at classiccmp.org] On Behalf Of Tony Duell
> Sent: Tuesday, July 19, 2005 2:43 PM
> To: cctalk at classiccmp.org
> Subject: Re: Mystery box
> 
> > 
> > The connector is a DB-37, used mostly for RS-499, but this does not 
> > look like that kind of device. The other common use for 
> this connector 
> > is in Analog/Digital control devices. I agree with the 
> comment that it 
> > looks like
> 
> I don't think you can deduce anything from the choice of 
> connector. 

Of course not. But this was a one-off box so I thought it reasonable to
conjecture based on the common uses of this connector.

> I've used a DC37 (note, AFAIK the DB37 does not exist, 

http://www.pccables.com/00830.htm

http://www.mycableshop.com/3rd_Level/Switchbox-DB37.htm

> although the DB44 does) conenctor for all sorts of 
> things, not related to RS449 

http://www.mycableshop.com/sku/CAB-SS-449MT.htm

> or ADCs

http://www.labmaster.com/products/mcdas/html/mcdas_index.html

> . IBM used it for the 
> external floppy drive connector on the PC, for example. 
> 
> AFter all, not all DB25s are RS232 ports :-)

However, more DB25s were RS232 ports before IBM used a DB25 for a parallel
port and before they later changed serial ports to a DB9 connector. 

Moreover, the DB25 connector is technically not a part of the RS-232 spec.
It is an de facto "standard." 

Gil

> 
> -tony
> 
>