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Modem Assigned to COM1

Discussion in 'Legacy Windows' started by David Favin, 2005/04/05.

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  1. 2005/04/05
    David Favin

    David Favin Inactive Thread Starter

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    Troops:

    I am doing a cousin a favor by installing a Robotics Sportster Model 0478
    into a computer I am giving him. Yes it is old but so is he. What I am interested in is whether the installation will reach the telephone line port on the internal modem.
    After the card and driver was installed I went to CONTROL PANEL->MODEM and read the following:
    Gateway 2000 Telepath 19400 Internal
    Telepath 56K for WINDOWS

    Hitting the PROPERTIES button for each of these I read the following
    For the Telepath 56K:
    PORT COM 1
    Max Speed 115200

    For the Gateway 2000:
    PORT COM 2
    Max Speed 19200

    Looking into this a bit more... If I look at the
    SYSTEM->MODEMS->DIAGNOSTIC
    For the Telepath 56K
    Long list of all kinds of properties

    For the Gateway 2000
    The following message "The modem failed to respond....Verify
    if the interrupt is OK. "

    The question I have is: Wll the modem work if I plug a telephone line
    into the modem line jack. Has that jack been assigned COM 1? It seems
    a strange assignment to me. If the port assignment is wrong what might I do to change it so as to make it work with the modem port.

    David Favin
     
  2. 2005/04/05
    Steve R Jones

    Steve R Jones SuperGeek Staff

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    COM1 is the "common" port that modems use. Give it a go.
     

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  4. 2005/04/06
    David Favin

    David Favin Inactive Thread Starter

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    I thought COM1 was the normal port associated with the motherboard. Is this not the usual case?
     
  5. 2005/04/06
    Steve R Jones

    Steve R Jones SuperGeek Staff

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    COM

    "(1) In DOS systems, the name of a serial communications port. DOS supports four serial ports: COM1, COM2, COM3, and COM4. However, most software uses system interrupts to access the serial ports, and there are only two IRQ lines reserved. This means that the four COM ports share the same two IRQ lines. Typically, COM1 and COM3 use IRQ4, while COM2 and COM4 use IRQ3. So in general, if you have two devices, one of which is attached to COM1 and the other to COM3, you cannot use them simultaneously. "
     
  6. 2005/04/06
    David Favin

    David Favin Inactive Thread Starter

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    Steve: I thank you for your response and I understand what you are saying. I still have, however, one remaining question.If I use this modem will the signals be on the normal telephone jacks located on the modem card or will they be on the 9 pin serial jack which I usually think of as COM1? Has the system made a change such that the telephone line jack on the modem card is now COM1?
     
  7. 2005/04/06
    iclarius

    iclarius Inactive

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    Dave,

    Most systems built in the past 8 years have an automatic assignment for the Comm ports. You internal (built into the mb) comm ports should be setup for automatic or disabled (I disable anything on the mb that I do not need). If you do not have any yellow exclamation ponits or question marks in Device Manager, then there is no conflict so do not worry about it. Connect the phone line and have at it.

    If you did have a conflict, the modem would not complete the diagnostic.

    George
     
  8. 2005/04/07
    David Favin

    David Favin Inactive Thread Starter

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    To those following this painful saga. I tried installing an internet service on this computer. When time came to make the network connection the system brought up an error message regarding a hardware failure. I do not believe the port on the modem board is COM1. I tried installing a different modem
    i.e. a diamond Multimedia and after the installation it was showed it to be installed on COM2. I haven't tried it but I am wuite sure this one will work. I suspect any installation resulting in a COM1 assignment for a modem

    David L. Favin
     
  9. 2005/04/07
    markp62

    markp62 Geek Member Alumni

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    You should try this. Start the computer in Safe Mode, and remove all modem entries, and the COM ports. Shut down, and remove modem.
    Then start the computer into "Command Prompt Only ", and do these commands.
    scanreg /opt
    scanreg /fix

    When you get the message "windows has repaired... ", reboot and allow windows to start up normally. Let the COM ports be redetected, then Shut down and install the modem.
     
  10. 2005/04/07
    BillyBob Lifetime Subscription

    BillyBob Inactive

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    David Favin

    AH !! Good old fashioned Comm Port problems .

    I do have a Question.

    By any stretch of the imagination do you have ANYTHING plugged into either one of the external 9 pin Serial Ports. Mouse for example.

    :) Don't ask why I come up with that question and I won't have to lie :)

    BillyBob
     
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