Korenix JetNet 3205GP.

JetNet 3205GP Industrial Unmanaged Gigabit PoE Ethernet Switch

JetNet 3205GP / JetNet 3205GP-1F is a compact size Industrial Ethernet Unmanaged Switch, which provides 4 ports 10/100/1000Base T(X), 802.3af(PoE), and 802.3at(PoE) compliant Ethernet ports and 1 Gigabit RJ-45 (fiber) port.
The JetNet 3205GP/JetNet 3205GP-1F provide up to 30 watts of power per PoE port for industrial applications such as IP surveillance or automation.
Along with its high switching performance, it supports multiple internal performance features, such as 9K bytes Jumbo Frame, Flow Control, and broadcast storm filtering  ensuring quality traffic transmission.

JetNet 3205GP / JetNet 3205GP-1F is designed for operating reliably under harsh environments, it supports one alarm relay to indicate fault conditions when power failure happens, as a result, users can quickly handle the emergency and shorten the failover time.
It has IP31 rugged mental housing provides great injection protection and heat dispersion capability for the need of -40~75 °C wide operating temperature, and it complies to EN50121-4 Track Side Standard so that can ensure the EMC protection capability.