The ATEN USB-to-Serial RS-232 Hub provides an external plug-and-play RS-232 serial connection for computers, notebooks, laptops, and handheld computing devices that support the USB specification. It provides a quick, simple, and cost-effective solution and is ideal for various communication and automation applications. Easy way to add 4 RS-232 serial ports Fully compliant with USB 1.1; USB 2.0 compatible Supports RS-232 serial interface Supports automatic handshake mode Up to 115.2 Kbps data transfer rate for each serial port Dual data buffers for each upstream and downstream data transfer No IRQ, DMA, I/O address resources required Supports hot-swapping and plug-and-play Built-in 16KV ESD protection Supports both bus power and external power Works with cellular phones, PDAs, digital cameras, modems and ISDN terminal adapters

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