One 16C950 UART Serial Port over PCMCIA Slot
Supports RS-485 Auto Transceiver Turn Around by Unique Featured ATTA Hardware
4-wire RS-422/485 and 2-wire RS-485 applications
Isolated and 15KV ESD Surge Protection
Fully 32-bit CardBus Type-II Slot, 16-Bit PCMCIA R7.1 and backward Compatible