AX99100 Chipset Supports RS-232 Bi-directional speeds up to 25 Mbps per port Full Serial Modem Control Supports Hardware, Software Flow Control Even, Odd, None, Space and Mark parity Special Baud Rate (Option) Multi-drop application for 9-bit mode
SYBA 4 Port RS-232 DB9 Serial M.2 B+M Key Controller Card - SY-PEX15066
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