- Provides async data rates up to 115.2 kbps over two or four wires.
- Half- or full-duplex operation over two or four wires.
- Point-to-point or multipoint operation.
- Distances up to 9 miles (14.4 km).
- Operates with or without transmit "echo."
- Two-wire half-duplex turnaround controlled by the RS-232 RTS signal.