Outdated Drivers
Can cause hardware related Errors. Check your PC Drivers now.

Windows DUN/RAS Error 601
"The port handle is invalid."

  • Press the "More Info.."button under Diagnostics while the modem's COM port is selected.  If you are able to get Ati# responses then you may just have to reboot, take out a problematic init string, or type ATZ as the init.

  • If this does not work, or is not the case try reinstalling the modem.

  • Press Ctrl-Alt-Delete, if you see RNAAPP loaded, then go to the RNAAPP fix page.

  • Try Uninstalling and reinstalling Dialup Networking and all of its associated components.

  • It is possible that the modem is not functioning.  Refer to computer manufacturer.

  • See Also:


This page was last modified on Saturday, 05-Feb-2011 15:11:54 EST.

This website is ©1999-Present Bradford Liedel DBA ModemHelp Networks and Web Services. Mason, MI 48854 USA. All rights reserved.