Sunix - SER5056A - Serial Board 4-Port RS-232 PCI SER5056A - Sunix - SUNIX 4-Port RS-232 Universal PCI Serial Board $112.39 $91.38
HP - AD280A - Serial Module 16-Port RJ-45 RS-232 AD280A - HP - 16-Ports RJ-45 RS-232 Module $640.57 $542.86
HP - 487120-001 - Serial Port Board with Cable 487120-001 - HP - 6730b Serial Port Board with Cable $36.90 $30.00
HP - J2482A - MUX Board 8-Port RS-232 EISA J2482A - HP - EISA 8-Port RS-232 Direct Connect MUX System Board Plugs into an EISA Slot $442.51 $359.77
HP - 930-3105-01E - Serial Adapter 8-Port RS-232 PCI 930-3105-01E - HP - Quatech 8-Port RS-232 Universal PCI Adapter $117.09 $99.23