The optical fiber cable color standard named EIA/TIA-598 has been defined by the Telecommunications Industry Association's organization for optical fiber cabling and the installation and termination of optical fibers in order to prevent human errors that were observed in choosing the type of fiber by experts or users of the network technology department. and provides conditions for experts not to face the problems of not identifying the type of fiber.
Outer cover color code:
The color of the outer coating of the optical fiber, printing on the optical fiber cable in all types of optical cables including distributed, interconnected cables, patch cords and breakout cables is an important criterion to identify the type of fiber, the size of the diameter of the optical fibers and the number of fibers.
According to the fiber color code standard, coating color codes are defined for different types of fiber. You can easily identify fiber optic cables that contain only one type of fiber by the color of their coating.
On the outer covering of cables that have more than one type of fiber, values are printed to identify the number and type of fibers. For example, a cable that has 12 optical fibers, 8 fibers are 50/125 microns and 4 fibers are 62.5/125 microns.
Fiber types Color code # #
Non-military applications Military applications Suggested print nomenclature
Multimode (50/125) (TIA-492AAAB) (OM2) orange orange 125/50
Multimode (50/125) (850 nm Laser-optimized) (TIA-492AAAC) (OM3, OM4) aqua undefined Lo 50/125 850
Multimode (62.5/125)(TIA-492AAAA) (OM1) orange slate 62.5/125
(Multimode (100/140 orange green 140/100
Single-mode(TIA-492C000 / TIA-492E000) (OS1, OS2) yellow yellow SM/NZDS, SM
Polarization Maintaining Single-mode blue undefined Undefined (2)
Note: In some cables that are used in outdoor environments (outdoor cables) to comply with essential standards such as no water penetration or resistance to ultraviolet rays or decay, the color of the outer cover is black or gray.
In this case, it is recommended that the technical information of the ordered cable be the same as the information listed on the cable, and the manufacturer is obliged to print all the necessary standard criteria on the cable so that installation experts and operators have difficulty in identifying and equipping the network infrastructure. do not face
Color codes of internal optical fibers:
Inside the loose tube fiber optic cables, each fiber optic strand is colored according to the fiber color code. According to the coloring standard, indoor fibers are coded as a group of 12 fibers and are counted clockwise.
There are two modes for multi-fiber cables:
For cables with multiple buffer tubes of 12 strands or less, each tube is numbered and colored according to the fiber color code below. For example: the color of tube 1 is blue, the color of tube 2 is orange and...
For cables that have more than 12 strands, 12 main colors are defined for optical fibers and the rest of the fibers are placed inside the cable based on these 12 main colors as a derivative of these colors. For example, inside a tube with 24 optical fibers, we will have two blue colors, one of which can be identified from the other by a dotted line or a black or white stripe.
