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    Best Seller
    StarTech Value PCI4S550N 4-Port Serial PCI Card

    StarTech Value PCI4S550N 4-Port Serial PCI Card

    PC - Compatible - PCI, Serial - Sku: PCI4S550N more

    $42

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    SIIG 8-Port USB to RS-232 Serial Adapter Hub (JU-SC0211-S1)

    SIIG 8-Port USB to RS-232 Serial Adapter Hub (JU-SC0211-S1)

    SIIG s 8-Port USB to RS-232 Serial Adapter Hub is designed to enable you to connect additional RS232 serial devices to your USB-enabled desktop or notebook computer. It instantly adds eight additional RS232 (9-pin) serial ports to your computer via an... more

    $99

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    Best Seller
    Syba SD-PEX50030 2 Port DB9 Serial and 1 Port DB25 Parallel PCIe x1 Controller Card Black

    Syba SD-PEX50030 2 Port DB9 Serial and 1 Port DB25 Parallel PCIe x1 Controller Card Black

    Easily add Syba SD-PEX50030 2 port DB9 serial and 1 port DB25 parallel port PCI-E X1 controller card with full and low profile bracket with MOs chip chipset to desktop PCs. Serial ports are ideal for connecting to modem, cellular phone, PDA, ISDN... more

    $16

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    More information about IO Controllers

    Best prices on ISDN in IO Controllers. Check out Bizrate for great deals on popular brands like SIIG, StarTech and SYBA. Use Bizrate's latest online shopping features to compare prices. Read product specifications, calculate tax and shipping charges, sort your results, and buy with confidence. Easily narrow your search and find the product that's perfect for you.