The AD279A HP 64‑Port PCI Serial MUX Adapter is a high‑density interface card designed to expand a host computer’s serial connectivity through a standard PCI slot. Providing 64 individual serial ports, the adapter uses multiplexing technology to manage multiple RS‑232 or compatible devices simultaneously, making it suitable for server, industrial, or data‑center environments that require extensive legacy equipment integration. Its HP branding indicates compatibility with HP server platforms and adherence to OEM quality standards. Installation is straightforward, requiring only insertion into an available PCI slot, after which the card delivers reliable, simultaneous serial communications across all ports.