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By Chris De Herrera 
Copyright 1998-2007
 All Rights Reserved
A member of the Talksites Family of Websites

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USB Advanced Network Functionality
By Chris De Herrera, Copyright 2007-2008
 Version 1.02 Revised 9/7/2008

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    1. Installation

    2. Initial Configuration

    3. USB Issues

    4. Guest Issues

    5. Firewall and Proxy Issues

    6. Outlook Errors

    7. Synchronization Errors

    8. Mobile Information Server / Outlook Mobile Access

    9. Exchange ActiveSync Error Codes and Solutions

    10. Missing Calendar, Contacts or Tasks Items

    11. Security Advisories

    12. ActiveSync 4.x Troubleshooting Guide - General

    13. ActiveSync 4.x Troubleshooting Guide - Limitations

    14. ActiveSync 4.x Troubleshooting Guide - 85010014

    15. ActiveSync 4.x Troubleshooting Guide - Firewall, VPN, Proxy

    16. ActiveSync 4.x Troubleshooting Guide - Logs & Services

    17. ActiveSync 4.x Troubleshooting Guide - Connection Flow

    18. USB Advanced Network Functionality

    19. Microsoft ActiveSync 4.2 Troubleshooting

    20. Using ActiveSync 4.x and Visual Studio 2005 and the Emulator

    21. Understanding ActiveSync or WMDC Partnerships


With the release of Windows Mobile 5.0, Microsoft changed the protocol used to sync via USB from PPP to RNDIS.  This has caused some problems with VPNs and other networking software installed on the PC you sync with.  So with AKU 2.3, Microsoft added back the ability to revert back to PPP.   You can use this option to change the USB functionality for ActiveSync 4.x as well as Windows Mobile Device Center (WMDC) to improve network compatibility.  The USB Advanced Network functionality is available in Windows Mobile 6 and 6.1.

Revert Back to PPP

On your Windows Mobile Pocket PC, click on Start - Settings - Connections and you will see the following screen:

Then select the USB to PC and you will see:

Uncheck the Enable advanced network functionality to disable RNDIS and enable PPP.

For the Windows Mobile Smartphone, click on Start - Settings - Connections and select the USB Device Type,  Then select ActiveSync Serial for PPP or ActiveSync RNDIS.  You will see two other options for Model and USB Mass Storage.  Modem is to use your Windows Mobile Device as a modem for your PC.  USB Mass Storage is to use your Windows Mobile Device as a storage drive from your PC.

If your problem is not resolved here, try Bev Howard's Solving ActiveSync Issues, the Microsoft ActiveSync Troubleshooter or Microsoft's Knowledge Base search on ActiveSync or Microsoft's Knowledge Base search on Mobile Information Server.

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