RS‑422 differential signals over twisted pair wires are less affected by noise. They therefore can communicate at faster rates and over longer distances. RS‑422 connectors are not standardized like RS‑232. Although better than the RS‑232, RS‑422 is still limited to one master and up to ten receivers on the bus. Recommended maximum length is 4000 feet. The Quintech RS‑422 standard is limited to 10 receivers.