Zoom 56K V.92/V.90 External Serial Fax Modem Model 3048 provides reliable analog connectivity for Windows, Mac, and Linux systems equipped with a serial port. This high-performance hardware features an on-board DSP and controller for improved performance, an integrated high-quality speaker for call monitoring, and ZoomGuard advanced lightning protection. It supports 56K data, fax, and voice mail functions, making it an ideal solution for legacy systems, remote out-of-band management, or locations where broadband is unavailable. The package includes the external modem, power adapter, serial cable, phone cord, and software CD. The box shows some shelf wear and has been opened, but the internal components remain in their original packaging.