The HSP56 WDM Device (PCtel) refers to a modem device used for dial-up internet connections, typically found in older computer systems. HSP56 stands for Host Signal Processor 56 and indicates that the device supports a 56Kbps dial-up modem standard for Internet communication. The WDM in the name stands for Windows Driver Model, which is the driver model used by Windows to handle hardware devices.

The PCtel HSP56 WDM Device specifically refers to a modem manufactured by PCtel, a company that produced various modem solutions. This modem was often used in computers that needed dial-up internet access or were equipped with internal modem cards.