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ITGlossary · Communication and monitoring
Ethernet Port (RJ45)
The UPS's Ethernet network port, through which it can be monitored and controlled from any computer on the network via a browser, SNMP or shutdown software.
Technical level:Basic
The Ethernet port is either built into the UPS or sits on a network management card fitted in a slot. It connects to the switch with an ordinary Cat5e or Cat6 network cable, up to 100 metres, and gets an IP address like any other device.
Compared with a USB or serial connection, which serves a single computer, the network port lets many servers be notified of a power cut at the same time and shut down in order.
Note that many UPS units also have a pair of RJ45 jacks marked IN/OUT to protect a network line against surges. These simply pass the signal through, do not communicate with the UPS and do not replace the management port. Also remember to power the network switch from the UPS.
Related terms
- SNMPA standard network protocol used to monitor and control devices like UPS systems over a network.
- Shutdown SoftwareSoftware that talks to the UPS and automatically shuts down servers and computers safely before the battery runs out.
- Network Management Card (NMC)An interface card enabling remote monitoring and control of UPS systems via network.
- Remote MonitoringThe ability to observe and manage UPS performance over a network from another location.
- Serial PortA communication port on a UPS used to connect and transmit signals to computers or monitoring equipment.
- NUT (Network UPS Tools)Open-source software that reads the UPS status and shares it over the network, so that several servers and NAS devices can shut down in a coordinated way.