What physical layer does Metasys N2 by JCI use?

Metasys N2 by JCI is a master/slave control network that uses RS-485 as the physical layer. RS-485 is a standard for serial data transmission over shielded twisted pair cables. It supports half-duplex communication at 9600 baud rate12. Metasys N2 also uses a common format called Network Virtual Terminal (NVT) to exchange data, commands, and server output between different types of terminals and operating systems