The PCI Soft Voice SoftRing Modem with SmartSP is a software-based modem card that combines both voice and data functionality. It is typically used in desktop PCs to provide dial-up internet connectivity, voice calling features (like VoIP), and possibly even fax capabilities, depending on the configuration. This modem is commonly used with legacy systems or in environments where traditional dial-up connections or voice services are still needed. The SmartSP (Smart Signal Processing) technology is a hardware-accelerated feature that enhances the modem's capabilities by offloading signal processing tasks to dedicated hardware, improving performance and reducing the load on the main CPU.