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Network Wiring Instructions

RJ-11 (Telephone) Plug | RJ-45 (Data) Plug | 110 Block / 66 Block Punchdown

1. RJ-11 (Telephone) Plug
   
   

   Figure 1

   
   Figure 1 is the wiring scheme for the plug side of an RJ-11 connector. The diagram is shown with the "hook clip" on the underside. The typical RJ-11 connector has six terminals. Usually, only the middle four pins are used. The POTS (Plain Old Telephone Service) residential telephone wiring generally contains two pairs of wires - designed for two separate telephone lines. The center pins (Red and Green) contain the first telephone line. Please note that business (digital) phone systems may be wired differently.
2. RJ-45 (DATA) Plug Wiring
   
   

   Figure 2

   Figure 2 is the wiring scheme for the plug side of an RJ-45 connector in accordance with T-568B standards. The T-568B standard is the most commonly used. The wiring diagram is shown with the "hook clip" on the underside. The wall jack may be wired in a different sequence because the wires may be crossed inside the jack. The jack should have a wiring diagram or designated pin numbers/colors to match up to the color code below. When wiring a jack or an RJ-45 plug, remember to keep the “twist” as close as possible to the (jack or plug) receptacle. This will insure compliance with Ethernet wiring standards.
   
   Specification T-568B

   Pin #	Color	Pair #	Name
   1	white/ orange	2	Transmit Data +
   2	orange	2	Transmit Data -
   3	white/ green	3	Receive Data +
   4	blue	1	not used
   5	white/ blue	1	not used
   6	green	3	Receive Data -
   7	white/ brown	4	not used
   8	brown	4	not used

   
   (Even pin numbers are always solid color. Odd pin numbers are white/ stripe color.)
   
   For reference purposes only, Figure 3 details the wiring scheme according to T-568A standards. Be sure adhere to EITHER the T-568B or the T-568A standard. Do not mix different wiring specifications within the same wiring installation.
   
   

   Figure 3

   
   

   Specification T-568A

   Pin #	Color	Pair #	Name
   1	white/ green	3	Receive Data +
   2	green	3	Receive Data -
   3	white/ orange	2	Transmit Data +
   4	blue	1	not used
   5	white/ blue	1	not used
   6	orange	2	Transmit Data -
   7	white/ brown	4	not used
   8	brown	4	not used

   Crossover Cable
   Some applications may require a crossover cable. The most common use of a crossover cable occurs in wiring together two Hubs. A crossover cable “crosses over” Transmit and Receive Data. Pins 1 and 3 are crossed over, and Pins 2 and 6 are crossed over. To build a CROSSOVER cable, simply wire one side according to specification T-568B, and wire the other side according to T-568A.

3. 110 Block / 66 Block Punchdown

   Punchdowns are made with the pairs in order with the white-stripe wire first, then the colored wire.

   Pair 1 white/blue - Blue
   Pair 2 white/orange - Orange
   Pair 3 white/green - Green
   Pair 4 white/brown - Brown

Reminder hint: BLOG– BLue Orange Green and Brown

Punchdown Block Order

Networking Products

110 and 66 Block Wiring From $9.50 Siemon’s 110 and 66 wiring blocks provide dependable support to data and voice applications.	Punchdown Tool - Greenlee Price $71.71 This punchdown tool allows you to terminate 66, 110, BIX, and Krone cross-connect and wall jacks, and creates a corrosion resistant termination while trimming off excess wire.
CAT 5E and CAT6 Bulk Cables From $10.00 per 50 FT These network cable products are high quality, UL listed and meet ANSI/TIA/EIA, ISO/IEC standards and are available in various colors.	EZ RJ45 Plug Connectors From $9.54 / Qty 15 The patented EZ-RJ® connector simplifies RJ45 connector plug twisted pair terminations by allowing the wires to be inserted through the connector and pulled OUT THE FRONT. Reducing the distance between the wire twists and the pin contacts improves electrical specification performance.

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