The thermostat supports the communication protocol (BACnet MS/TP) as per the BACnet specification (see https://bacnet.org).
MAC address
The MAC address is assigned to "4" (factory setting). Engineer/installer can change the address value via parameter P93 as needed.
Baud rate
The baud rate is selectable. Five options, auto, 9600 bps, 19200 bps, 38400 bps and 76800 bps, are available for the BACnet network (38400 bps is default).