Add two RS422/485 serial ports through a standard or low profile PCI expansion slot. - Supports maximum data transmission rate of 128 Kb/s - 16C1050 UART with 256-byte Deep FIFO - Supports 2-wire and 4-wire RS485 modes - Jumper pins for RS422/485 toggling - Supports Hardware and Software flow control - Supports PCI Power Management 1.1 - Compliant with PCI Local Bus Specification 2.3 - Standard profile (low-profile installation bracket included)