US Robotics USR 56K Kbps PCI Modem PN 3CP2976-OEM

US Robotics 0584 56K PCI Voice Fax Modem Card Internal USR Vintage

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

US Robotics 56K Internal Fax/Modem V.90 PCI Model 0778 3Com 3CP5610 UNTESTED

3COM US Robotics 3CP2976-OEM-50 0727 56K PCI Modem 1.012.0727-G

US ROBOTICS Low Profile USR805671 PCI Internal 56Kbps Fax Modem V.90 V.92

3Com 0727/3CP2976-OEM USR 56Kbps Voice PCI Modem Card "Q6E"

US Robotics 3Com 3CP5610 56K 0726 PCI Voice Fax Modem Internal Card