Power Over Ethernet refers to the technology that provides dc Power to some ip-based terminals (such as IP telephones, wireless LAN access points AP, webcams, etc.) while transmitting data signals without any changes to the existing Ethernet cat.5 wiring infrastructure. POE, also known as POL (Power over LAN) or Active Ethernet (sometimes referred to simply as Ethernet Power), is the latest standard specification for the simultaneous transmission of data and Power over existing standard Ethernet cables while maintaining compatibility with existing Ethernet systems and users.

Passive PoE usually refers to devices that use PoE that are not 802.3af or 802.3at. This includes equipment such as cameras and radio antennas using the 24V PoE. Passive PoE does not perform handshakes, so it is important to know how much PoE voltage your device needs before plugging in an Ethernet cable and powering it. If you connect the wrong voltage, you may cause permanent electrical damage to the device. Passive PoE is like plugging a 120V appliance into a 240V socket, but it costs more than a simple toaster.

E-Lins has several 4g sim routers that support passive POE, including H685, H720, H750, H820QO and H900.

Among them, the default mode of power access of H820QO sim card router is passive POE. It can also support 2 pin terminal block to access DC power.
E-Lins’ 4g industrial sim card routers support 5-40VDC default. Optional support 5-60VDC.

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