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Used- MDM-5RJTAI-35500 Prime Peripherals 56K V.90 External Serial Modem With data, fax, and voice capabilities. For Win 95/98. Plug play. Intel chipset. - Walmart.com
U.S. Robotics 56k Serial Controller Faxmodem (USR5686G) | OfficeCrave.com
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USRobotics 56K Serial Controller Fax Modem 5686G Power Adapter Cord Supply V.92 | eBay
US Robotics Serial Controller Dial-Up External Fax/Modem