TITLE
    Mac OS 9.1: Connection Issue With Some USB Modems
Article ID:
Created:
Modified: 		31322
3/21/01
3/21/01
TOPIC

    After updating to Mac OS 9.1, some types of USB modems will not respond properly when attempting to connect to an ISP.

DISCUSSION

    Symptom

    After updating to Mac OS 9.1, some types of USB modems do not respond properly when attempting to connect to an ISP. With Mac OS 9.0.4 installed, the modem can connect to the Internet service provider (ISP) without any difficulty.

    Products affected

    • Mac OS 9.1
    • Some third-party USB modems
    Solution

    The standard USB modem driver included in Mac OS 9.1 is based on the USB Communications Device Class (CDC) specifications. Early USB modems that are not compliant with the CDC specifications may no longer behave as expected.

    If you have difficulties with your USB modem after updating to Mac OS 9.1, contact the modem manufacturer to ask about an update.

    Note: You may be able to restore functionality to your third-party USB modem by reinstalling Mac OS 9.0.4. For information on how to perform a clean installation of Mac OS 9.0.4, see article 60496: " Mac OS 9: Performing a Clean Installation ."


Document Information
Product Area: Mac OS System Software
Category: Mac OS 9.1
Sub Category: Troubleshooting
Keywords: kmos91

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