This is close to being new as you will find.... was taken out of the box over 10 years ago, used for testing at an IT shop, and then sent to the recycle pile.
U.S. Robotics 56k modems were popular dial-up devices from the late 90s/early 2000s, offering up to 56 Kbps download speeds via standards like V.90 and V.92, enabling internet access and faxing before broadband became widespread, with models like the Sportster and Courier known for reliability in connecting over phone lines, even featuring software upgrades and line probing for better performance.
Key Features & Technology:
Speed: Achieved maximum download speeds of 56 kilobits per second (Kbps) and upload speeds up to 48 Kbps (with V.92).
Standards: Evolved with standards like proprietary X2/K56flex, then standardized under V.90 (1998) and later improved with V.92 (2000).
Controller-Based: Many USR modems used dedicated processors for better performance, unlike simpler "Winmodems".
Line Probing: Advanced technology to detect line conditions and optimize connection quality.
Fax Capabilities: Included software to turn computers into fax machines, supporting delayed and broadcast faxes.
Compatibility: Supported various operating systems, from Windows 95/98 to Windows XP, and even Linux/DOS.
Asking $20 - Cash preferred, but can do PayPal, Venmo, or Zelle.