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2. Power over Ethernet - Wikipedia

   en.wikipedia.org/wiki/Power_over_Ethernet

   The original PoE standard, IEEE 802.3af-2003, [1] now known as Type 1, provides up to 15.4 W of DC power (minimum 44 V DC and 350 mA) [2] [3] on each port. [4] Only 12.95 W is guaranteed to be available at the powered device as some power dissipates in the cable.

3. 48-volt electrical system - Wikipedia

   en.wikipedia.org/wiki/48-volt_electrical_system

   A 48 V system can provide more power, improve energy recuperation, [7] and allow up to an 85% decrease in cable mass. [10]12-volt systems can provide only 3.5 kilowatts, while a 48 V power could achieve 15 to 20 kW or even 50 kW. 48 volts is below the level that is considered safe in dry conditions without special protective measures. [11]

4. IEEE 802.3 - Wikipedia

   en.wikipedia.org/wiki/IEEE_802.3

   IEEE 802.3 is a working group and a collection of standards defining the physical layer and data link layer's media access control (MAC) of wired Ethernet.The standards are produced by the working group of the Institute of Electrical and Electronics Engineers (IEEE).

5. Perle Systems - Wikipedia

   en.wikipedia.org/wiki/Perle_Systems

   2020, Launches a 10-port PoE (100W) Gigabit Switch with Fiber or Copper uplink ports; [39] Launches IOLAN SCR1618 Secure Out-of-Band Management Console Server; [40] 2021, Launches FirstNet™ Ready LTE Routers; [41] 2022, Launches Enterprise-Class Edge 5G Routers; [42]

6. Coaxial power connector - Wikipedia

   en.wikipedia.org/wiki/Coaxial_power_connector

   Used in TP-Link Gigabit switch model TL-SG105(UN) Ver:6.0 4.00 1.70 9.5 B EIAJ-02 ... Used in Acer Aspire V5 adapter and some Hikvision 48V NVRs 5.50 2.10 M CUI Inc. P5

7. Uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Uninterruptible_power_supply

   A large data-center-scale UPS being installed by electricians. An uninterruptible power supply (UPS) or uninterruptible power source is a type of continual power system that provides automated backup electric power to a load when the input power source or mains power fails.