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RJ14 and RJ21 Color Scheme

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RJ14 and RJ21 connectors are types of registered jack (RJ) connectors that are commonly used in telecommunications. These connectors are used to connect telephone lines and other types of communication equipment. In this article, we will discuss the color schemes for RJ14 and RJ21 connectors, as well as provide some examples of how these connectors are used.

RJ14 Connectors:

RJ14 connectors are similar to RJ11 connectors, but they have 4 pins instead of 6. They are commonly used to connect two telephone lines and are often found in residential and small business telephone systems. The color scheme for RJ14 connectors is as follows:

  • Pin 1: Green
  • Pin 2: Red
  • Pin 3: Black
  • Pin 4: Yellow

For example, an RJ14 connector might be used to connect two telephone lines to a small business telephone system. The green wire would be connected to the first line, the red wire would be connected to the second line, the black wire would be used for ground, and the yellow wire might be used for a second ground or for a signaling function.

RJ14 Diagram:

RJ14

 

RJ21 Connectors:

RJ21 connectors are multi-line connectors that are commonly used in telecommunications systems. They have a larger number of pins, typically 25 or 50, and are used to connect multiple lines or circuits. The color scheme for RJ21 connectors varies depending on the specific application and the number of pins. However, some common color schemes for RJ21 connectors include the following:

25-pin connector:

  • Pins 1-4: Green
  • Pins 5-8: Red
  • Pins 9-12: Yellow
  • Pins 13-16: Black
  • Pins 17-20: Violet
  • Pins 21-25: Gray

50-pin connector:

  • Pins 1-10: Green
  • Pins 11-20: Red
  • Pins 21-30: Yellow
  • Pins 31-40: Black
  • Pins 41-50: Violet

For example, an RJ21 connector might be used to connect a large office telephone system to multiple telephone lines. The green wires would be connected to the first group of lines, the red wires would be connected to the second group of lines, and so on. The specific function of each pin would depend on the specific application and the wiring scheme used by the telephone system.

RJ21 Diagram:

    _______________
   |               |
1  |               |  25
   |_______________|
   |               |
2  |               |  24
   |_______________|
   |               |
3  |               |  23
   |_______________|
    ...            ...
   |               |
24 |               |  2
   |_______________|
   |               |
25 |               |  1
   |_______________|

Note that the diagrams show the arrangement of the pins on the connector, but they do not show the specific color scheme. The color scheme for each connector type is listed in the above lists.

Conclusion

In conclusion, RJ14 and RJ21 connectors are important components of telecommunications systems. They are used to connect telephone lines and other types of communication equipment, and they have specific color schemes that are used to identify the function of each pin. By understanding the color schemes for these connectors, you can better understand how they are used in different applications.


Last Updated : 30 Jan, 2023
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