The HSP56 MR is a modem device, typically a 56K dial-up modem manufactured by Conexant (formerly Rockwell). This modem was commonly used in older computers for dial-up internet connections and faxing. "HSP" stands for "Host Signal Processor," which refers to a modem design where some of the processing is offloaded to the computer's main processor instead of being handled by the modem hardware itself.