Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!LL.ARPA!SAGE From: SAGE@LL.ARPA Newsgroups: comp.os.cpm Subject: Re: Prob with Compaq serial port (COM1) Message-ID: <8902131431.AA02058@ucbvax.Berkeley.EDU> Date: 13 Feb 89 13:30:56 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 35 Local addressee: SAGE Message-ID: Andrew Sigal wrote: >> It appears that the built in serial port (COM1:) is >> holding Carrier Detect (CD) high all the time. When I saw this message, I got all excited, because I have been having a similar problem with an internal modem on my Kaypro 286/16 computer. The PCBoard BBS software refuses to run, complaining that carrier detect is asserted. I played with all the switches on the board and with the "&C" and "&D" commands to the modem, all to no avail. I thought maybe this message would have some clues for me. Then I got to the part: >> I just purchased a new modem (Zoom Telephonics 2400 baud external) Curious! The modem that is giving me trouble just happens to be a Zoom modem (model 2400 PC, I believe it is called -- very fancy with internal messaging capability, real-time clock, demon dialing, etc.)! Probably just a coincidence, but... This modem claims to be as Hayes compatible as a Hayes, but no matter what, that carrier detect signal seems to be there all the time. I will have to get myself copies of the two programs mentioned, BRKBOX and COMHELP, and see what they report about the modem interface. I tried writing a quick Turbo Pascal program to look at the ports, but I did not succeed in learning anything useful. Does anyone have any suggestions on this problem? Anyone else own this modem? -- Jay Sage