Best Buy: U.S. Robotics 56K V.92 External Data/Fax Modem USR5686E
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Lucent 56K V.92 PCI Fax Modem
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Amazon.com: USB 56K Voice Fax Data External V.90 V.92 Modem With Dual Ports, Compatible With Windows 98SE/2000/ME/XP/Vista/Win 7 and Support Auto-Dial, Tone and Pulse Dialing, Auto Answer, Auto Retrain (Black Color) :
External USB 2.0 Fax/Data Modem 56K V.92 - Bluetooth & Telecom Adapters | StarTech.com