Brand New Vintage US Robotics Model 5686 3Com 56K Faxmodem External Modem

US Robotics Standard 56K Fax Modem

U.S. ROBOTICS 56K USB Faxmodem 5633 USR5633 USR135633 v.90 v.92 56K MODEM FAX

3Com U.S. Robotics 56k Fax/Modem

NEW 3Com US Robotics 56k Winmodem Model 5683 ISA MODEM

US Robotics 56K V.92 Fax Modem 5686 W/ Serial Cable - No Power Supply - Untested

US ROBOTICS 5686G 56K SERIAL CONTROLLER FAX MODEM

U.S. ROBOTICS V.92 56K FAX MODEM SWITCH