Creating a Plug and Play Device Identifier

A modem needs to have a Plug and Play identifier to enable the OS to recognize the device so that it can load the appropriate software. Each device manufacturer is responsible for assigning the Plug and Play identifier for each product and storing it in the hardware. Refer to the relevant Plug and Play Specification to determine how to include the identifier in the hardware.

For modem manufacturers, it is important to follow the Plug and Play Specification and implement a unique device identifier to ensure that it works with Windows CE. A Plug and Play identifer usually consists of:

• A three-character vendor identifier.
• A four-digit product identifier; for example, XYZ1234.

For a modem, the Plug and Play identifier syntax is CompanyName-ModelName-Checksum.