{"id":9743,"date":"2025-06-20T11:26:59","date_gmt":"2025-06-20T03:26:59","guid":{"rendered":"https:\/\/totcables.com\/?p=9743"},"modified":"2025-06-20T11:26:59","modified_gmt":"2025-06-20T03:26:59","slug":"t568b-wiring-guide-rj45-ethernet-cable-pinout-diagram","status":"publish","type":"post","link":"https:\/\/totcables.com\/?p=9743","title":{"rendered":"T568B Wiring Guide: RJ45 Ethernet Cable Pinout & Diagram"},"content":{"rendered":"

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T568B wiring<\/strong> is one of the two recognized standards for wiring RJ45 Ethernet cables<\/strong>, the other being T568A<\/strong>. T568B is the most widely used wiring scheme for network cables<\/strong>, especially in residential<\/strong>, commercial<\/strong>, and telecom installations<\/strong>.<\/p>\n

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T568B Wiring

T568B Wiring<\/p><\/div>\\n<\/p>\n

In this guide, you\u2019ll learn what T568B wiring is, how to wire an Ethernet cable using the T568B standard, and when to choose it over T568A.<\/p>\n

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\ud83d\udccc What Is T568B Wiring?<\/h2>\n

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T568B<\/strong> is a pinout standard<\/strong> for 8P8C modular connectors<\/strong> (commonly known as RJ45 plugs) used in Cat5e, Cat6, and Cat6a Ethernet cables<\/strong>. The T568B standard defines the order of the color-coded twisted pairs<\/strong> inside the cable for consistent signal transmission.<\/p>\n

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\u2705 T568B is defined by TIA\/EIA-568<\/strong> standards and is commonly used in network patch cables<\/strong>, data centers<\/strong>, and structured cabling systems<\/strong>.<\/p>\n

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\ud83d\udcca T568B RJ45 Pinout Chart<\/h2>\n

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Below is the correct color code for T568B wiring:<\/p>\n

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\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n\\n<\/p>\n
Pin Number<\/strong><\/th>\n

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T568B Wire Color<\/strong><\/th>\n

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Pair<\/strong><\/th>\n

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Function<\/strong><\/th>\n

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1<\/td>\n

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White\/Orange<\/td>\n

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Pair 2<\/td>\n

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Transmit + (TX+)<\/td>\n

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\\n<\/p>\n

2<\/td>\n

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Orange<\/td>\n

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Pair 2<\/td>\n

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Transmit \u2013 (TX\u2013)<\/td>\n

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3<\/td>\n

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White\/Green<\/td>\n

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Pair 3<\/td>\n

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Receive + (RX+)<\/td>\n

\\n<\/tr>\n

\\n<\/p>\n

4<\/td>\n

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Blue<\/td>\n

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Pair 1<\/td>\n

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Unused \/ Power (PoE)<\/td>\n

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\\n<\/p>\n

5<\/td>\n

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White\/Blue<\/td>\n

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Pair 1<\/td>\n

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Unused \/ Power (PoE)<\/td>\n

\\n<\/tr>\n

\\n<\/p>\n

6<\/td>\n

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Green<\/td>\n

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Pair 3<\/td>\n

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Receive \u2013 (RX\u2013)<\/td>\n

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\\n<\/p>\n

7<\/td>\n

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White\/Brown<\/td>\n

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Pair 4<\/td>\n

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Unused \/ PoE<\/td>\n

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\\n<\/p>\n

8<\/td>\n

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Brown<\/td>\n

\\n<\/p>\n

Pair 4<\/td>\n

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Unused \/ PoE<\/td>\n

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