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2. Power over Ethernet - Wikipedia

   en.wikipedia.org/wiki/Power_over_Ethernet

   Passive DC-to-DC injectors also exist which convert a 9 V to 36 V DC, or 36 V to 72 V DC power source to a stabilized 24 V 1 A, 48 V 0.5 A, or up to 48 V 2.0 A PoE feed with '+' on pins 4 & 5 and '−' on pins 7 & 8. These DC-to-DC PoE injectors are used in various telecom applications. [57]

3. 19-inch rack - Wikipedia

   en.wikipedia.org/wiki/19-inch_rack

   Thus, a 1U rackmount computer is not 1.750 inches (44.5 mm) tall but is 1.719 inches (43.7 mm) tall. If n is number of rack units, the ideal formula for panel height is h = 1.75 n − 0.031 for calculating in inches, and h = 44.45 n − 0.794 for calculating in millimeters.

4. List of PowerEdge servers - Wikipedia

   en.wikipedia.org/wiki/List_of_PowerEdge_servers

   Rack-mounted 11th-generation PowerEdge servers. PowerEdge is a server line by Dell, following the naming convention for other Dell products: PowerVault (data storage) and PowerConnect (data transfer & switches).

5. Rack unit - Wikipedia

   en.wikipedia.org/wiki/Rack_unit

   Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...

6. IEEE 802.3 - Wikipedia

   en.wikipedia.org/wiki/IEEE_802.3

   Gigabit Ethernet over plastic optical fiber (POF) 802.3bw 2015-10 [4] 100BASE-T1 – 100 Mbit/s Ethernet over a single twisted pair for automotive applications 802.3-2015 2015-09 802.3bx – a new consolidated revision of the 802.3 standard including amendments 802.3bk/bj/bm 802.3by: 2016-06 [5] Optical fiber, twinax and backplane 25 Gigabit ...

7. Power distribution unit - Wikipedia

   en.wikipedia.org/wiki/Power_distribution_unit

   A 10-outlet rack-mount PDU (front), connected to a UPS (bottom unit on right) A temporary PDU, distributing 120 volt AC power at an outdoor event Cabinet PDU with access doors open A power distribution unit ( PDU ) is a device fitted with multiple outputs designed to distribute electric power, especially to racks of computers and networking ...