Which device is used to inject power into PoE cabling for connected devices?

Which device is used to inject power into PoE cabling for connected devices?

• A. Power over Ethernet (Injectors/switch)
• B. RFI
• C. Privacy
• D. Quad (SFP) or QSFP Transceiver

Answer: (A)

Power over Ethernet delivers both data and DC power over the same Ethernet cable. To provide that power, you use a PoE injector or a PoE-enabled switch. The injector adds DC power from a supply onto the Ethernet line so devices like IP cameras, VoIP phones, or wireless access points can operate without a separate power adapter. The powered device negotiates with the injector or switch to draw only the amount of power allowed. RFI, privacy concerns, and SFP/QSFP transceivers don’t inject power into PoE cabling, so they aren’t the correct mechanism. The PoE injector or PoE-capable switch is the device that makes PoE power possible.

Power over Ethernet delivers both data and DC power over the same Ethernet cable. To provide that power, you use a PoE injector or a PoE-enabled switch. The injector adds DC power from a supply onto the Ethernet line so devices like IP cameras, VoIP phones, or wireless access points can operate without a separate power adapter. The powered device negotiates with the injector or switch to draw only the amount of power allowed. RFI, privacy concerns, and SFP/QSFP transceivers don’t inject power into PoE cabling, so they aren’t the correct mechanism. The PoE injector or PoE-capable switch is the device that makes PoE power possible.