Subject: Re: Serial Console-Printer cable(Would it work?)
To: Bob Nestor <rnestor@metronet.com>
From: Bill Studenmund <wrstuden@loki.stanford.edu>
List: port-mac68k
Date: 03/10/1997 09:38:32
> 
> Standard (Apple defined) High-speed Mac Modem cable
> 
> 			         DIN 8 (MAC/DTE)    	RS-232 (Modem/DCE)
>                       ---                    ----
>       DTR   HSKo     | 1 |----------------->| 20 |--+  DTR
>       CTS   HSKi     | 2 |<-----------------| 5  |  |  CTS
>       TxD   TxD-     | 3 |----------------->| 2  |  |  TxD
>       GND   GND   +--| 4 |<---------------->| 7  |  |  GND
>       RxD   RxD-  |  | 5 |<-----------------| 3  |  |  RxD
>       N.A.  DEAD  |  | 7 |---nc        nc---| 8  |  |  DCD
>       N.A.  RxD+  +--| 8 |             nc---| 1  |  |  GND
>                       ---                   | 4  |--+  RTS
>              Note:                           ----   
>                 Pins 4 & 8 are hooked together on the MAC side, and also
>                 connect to pin 7 on the Modem side.  Pins 4 & 20 are 
> hooked together
>                 on the Modem side, and also connect to pin 1 on the MAC 
> side.

I'd suggest that Mac pin 7 be hooked to DCD on the modem.

Take care,

Bill