Rocky Mountain
Telephone, Inc.

 

 

Modular Plugs

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Modular Plugs

 

 

 

 

Modular Plugs and Jacks

 

Jacks and plugs are wired to conform to Uniform Service Ordering Code ("USOC") numbers, originally developed by the Bell System, and endorsed by the FCC. One specific piece of hardware can be wired in different ways, and have different USOC numbers. USOC has become an acronym, pronounced "you-sock," and jack wiring schemes are generally referred to as "USOC codes.

 

Usage

 

Each of the basic modular plug styles can be wired for different configuration. For example, the 6-position jack can be wired as a RJ11 (1-pair), RJ14 (2-pair), or a RJ25 (3-pair) configuration. An 8-position jack can be wired for configurations such as RJ61 (4-pair) and RJ48. The keyed 8-position jack can be wired for RJ45, RJ46 and RJ47. 

 

 

 

 

 

   The RJ11 modular plug can be used for single pair. 

 

 

RJ11  Wiring

 

Color Code

Pin out

White / Blue 3
Blue / White 2
White / Orange 1
Orange / White 4

 

 

 The RJ14 modular plug can be used for single pair or two pair configurations. 

 

 

RJ14  Wiring

 

Color Code

Pin out

White / Blue 3
Blue / White 2
White / Orange 1
Orange / White 4

 

 

 

The RJ25 modular plug can be used for one, two and three pair configurations.

 

 

RJ25 Wiring

 

Color Code

Pin out

White / Blue 4
Blue / White 3
White / Orange 2
Orange / White 5
White / Green 1
Green / White 6

 

 

 

The 8 position 8 conductor jack can be configured to meet several requirements.

 

 

 

568A Wiring

 

Color Code

Pin out

White / Blue 5
Blue / White 4
White / Orange 3
Orange / White 6
White / Green 1
Green / White 2
White / Brown 7
Brown / White 8

 

 

 

 

568B Wiring

 

Color Code

Pin out

White / Blue 5
Blue / White 4
White / Orange 1
Orange / White 2
White / Green 3
Green / White 6
White / Brown 7
Brown / White 8

 

 

 

Other 8P8C Configurations

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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