Bus System refers to all device nodes, such as zone modules and alarm devices, being connected to two communication lines. Regardless of how many devices there are, they can share these communication lines.
Branch System means that all connected devices must use independent communication lines to connect to the host.
For example: When an alarm host needs to manage 10 alarm devices, the bus system only requires one two-core communication line, while the branch system requires 20 two-core communication lines to connect to the alarm devices individually.
