Subject: Re: Serial ports on 3/50
To: Geert Bosch <>
From: Curt Sampson <>
List: port-sun3
Date: 10/22/1995 21:02:56
On Sun, 22 Oct 1995, Geert Bosch wrote:

> It turned out to be the Carrier Detect which was
> the problem: if you don't connect it at all everything works allright,
> but when it's connected to your modem, you'll only be able to write to
> the serial port when the Carrier Detect is high, which is really 
> troublesome with modems because most applications expect Carrier Detect 
> to be high only when a connection has been established.

The application should set CLOCAL when it opens the modem port if it
needs to dial the modem.

Curt Sampson		Info at
Internet Portal Services, Inc.	
Vancouver, BC   (604) 257-9400		De gustibus, aut bene aut nihil.