Microsoft KB Archive Search

Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

  1. Home
  2. "Error 630" or "Port Is Invalid or Busy" When Dialing Out with a Modem

"Error 630" or "Port Is Invalid or Busy" When Dialing Out with a Modem

View products that this article applies to.

If this article does not describe your hardware-related issue, please see the following Microsoft Web site to view more articles about hardware:
http://support.microsoft.com/default.aspx/w98?sid=460

↑ Back to the top

Symptoms

When you attempt to dial out with a modem, you may receive any of the following error messages:
  • Error 630: The computer is not receiving a response from the modem. Check that the modem is plugged in, and if necessary, turn the modem off, and then turn it back on.
    Communication port is invalid or busy.
    Error 630:

    The modem is not responding correctly. Please verify that the modem is plugged in to the computer and to the telephone line. If the problem persists, please select 'Help' button to start the Windows Modem Troubleshooter.

↑ Back to the top

Cause

This behavior can occur if you have the "Support SerialKey devices" Accessibility option configured to use the COM port to which your modem is connected.

↑ Back to the top

Resolution

To resolve this issue:
  1. Click Start, point to Settings, click Control Panel, and then double-click Accessibility Options.
  2. On the General tab, either:
    • Click to clear the Support SerialKey devices check box, or
    • Click Settings, click a different COM port in the Serial port box, and then click OK.
  3. Click OK.

↑ Back to the top

Keywords: kbenable, kbenablemove, kberrmsg, kbprb, kb

↑ Back to the top

Article Info
Article ID : 227995
Revision : 4
Created on : 8/1/2019
Published on : 8/1/2019
Exists online : False
Views : 270