Date   : Mon, 02 Nov 1992 16:34:20 GMT
From   : agate!spool.mu.edu!caen!hellgate.utah.edu!cc.usu.edu!ivie@ucbvax.Berkeley.EDU (CP/M lives!)
Subject: Re: 5v out serial port

In article <1992Oct30.112351.1@hamp.hampshire.edu>, jmolinari@hamp.hampshire.edu
writes:
>   I have a Hayes compatible modem which, when I plug it into my Amiga,
> makes a sort of "squelch", indicating that the serial is supplying it with
> eliectricity.  It does no such thing when I plug it into the Kaypro, and,
> not surprisingly, does not respond to Hayes-commands (ATH0, etc.).  It just
> sits there.
>   Parting from this, I'll rephrase my original question:
> 
>   IS the +/- 9v output in the Kaypro a sufficient standard to assume
> that my Amiga puts out the same quantity?  If this is so, then the serial
> on the Kaypro IS damaged, as the modem receives no power.

Modems are not supposed to be _powered_ from the serial port. The Amiga does
provide +12V power for external devices, but this is not _standard_ behavior.
The only thing modems are supposed to take from the serial port are modem
signals.
-- 

Roger Ivie                      "My God! That computer is full of Pentium!
ivie@cc.usu.edu                  It's a wonder that you haven't been turned
                                 into mutants!"