Functions of RS485 and MON ports on the CMU of an S series switch


The RS485 and MON ports (using RJ45 connectors) on the CMU are reserved for function expansion in the future.

For example, if the switch supports external PoE, the RS485 port connects to the external PoE power module.
If the switch supports external environment monitoring, the MON port connects to the sensors (such as temperature sensors and smoke sensors) as an input port for environment monitoring.

The preceding functions are used as examples to describe the port functions, and they are not supported by S switches currently.

Other related questions:
Functions of the CMU on S series switches
The CMU on an S series switch is used to centrally manage power and fan modules of the system. The CMU provides the following fan module management functions: - Fan module presence detection - Fan module registration management - Fan speed query - Fan speed control - Management and report of fan module alarms - Query of fan module electronic labels The CMU provides the following power module management functions: - Power module presence detection - Automatic shutdown of power module - Power module registration management - Voltage and current detection of power module - Management and report of power module alarms - Query of power module electronic labels

What are functions of the router port on an S series switch?
IGMP Report and Leave messages need to be forwarded to the router port to maintain protocol correctness. If no router port is configured on the device enabled with IGMP snooping, IGMP Report messages may fail to be forwarded to the upstream device, causing a multicast traffic interruption.

Connection of the MON port of the OBU board
The MON port of the OBU board connects to the input optical port of an optical spectrum analyzer board.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top