● COM-2S: Two independent, completely configurable, serial ports

● COM-1S: One, completely configurable, serial port

● Supports conventional RS232, High-speed RS-422, and Multi-drop RS-485

● Supports all standard RS-232 lines: TD, RD, RTS, CTS, DCD, DTR, and DI

● Can be wired for 2 or 4 wire RS-422/485 communications

● Supports RS-485 handshaking on-board without special drivers to support Windows and non-DOS programs

● Built-in support for local echo, line termination, and line bias supplies

● Supports extended AT interrupts

● LED status monitors on transmit and receive lines for troubleshooting

● Equipment monitoring

● Environmental measurements

● Embedded data acquisition

● Education/Laboratory

● Industrial Automation

Drivers for various operating systems are also provided, including active support for Windows XP -> 10 — all in both 32-bit and 64-bit flavors, and including consumer, server, and embedded varieties — as well as the 2.6 and newer Linux kernels and recent OSX / macOS versions. Many products continue to ship with driver support for Windows 95, 98, Me, NT4, and Windows 2000, but support for these operating systems is considered deprecated.