3Com U.S. Robotics 56K Modem PC Card 3056 3Com USR XJ Vintage Computing

PCI 56K Modem 0637 3COM US Robotics

US Robotics 0584 (005687-03) 56K V.90 Internal 16-bit ISA Modem (Please Read)

US Robotics USR5638 Fax Modem 56 Kbps V.92 PCI-Express LOW PROFILE BRACKET

56K Internal PCI Modem Network Card - SMART Modular Technologies 90109-2 HBC/NIC

Vintage 3Com U.S. Robotics 56K Faxmodem Internal ISA - Model 5687 - SEALED / NIB

US Robotics 0766 64-005699-02 56K PCI Fax Modem Card RJ11 Line Phone

PCI 56K Modem 0637 3COM US Robotics