Article ID: 837637 - View products that this article applies to.
Universal serial bus (USB) modem .inf files can both use the Usbser.sys driver and directly reference the Usbser.sys driver from the .inf file. However, we do not recommend this.
Instead, we recommend the following:
To reference the Usbser.sys driver in all the products that are listed in the "Applies to" section, we recommend that USB modem .inf files reference the Mdmcpq.inf file.
For example, the DDInstall section of an .inf file uses the Include directive and may be similar to the following:
The following sections appear in the Mdmcpq.inf file in all the products that are listed in the "Applies to" section:
For more information, see the "Device Installation" topic in the Microsoft Windows Driver Development Kit documentation.