TIA-598C Fiber Color Code & RJ45 Pinout Simulator

Visualizer for TIA-598C fiber optic color codes from 1 to 288 cores, tube mapping, and RJ45 LAN pinout diagrams (T568A/T568B) with PoE pairing.

Input Parameters

Try Example:

Calculation Results

Selected Core Number: 27
Loose Tube Number: 3
Core Position in Tube: 3
Tube Color (TIA-598C): Tube #3: Hijau (Green) (Solid)
Fiber / Core Color (TIA-598C): Core #3 (di dalam Tube): Hijau (Green) (Solid)
Tube Hex Color Code: #16a34a
Core Hex Color Code: #16a34a
Total Tube Count in Cable: 4
Selected RJ45 Wiring Standard: T568B

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12-Core Sequence Table in Selected Tube

Global Core Number	Position in Tube	Hex Color Code
Core #25	Pin/Core 1	#2563eb
Core #26	Pin/Core 2	#f97316
Core #27	Pin/Core 3	#16a34a
Core #28	Pin/Core 4	#78350f
Core #29	Pin/Core 5	#64748b
Core #30	Pin/Core 6	#f8fafc
Core #31	Pin/Core 7	#dc2626
Core #32	Pin/Core 8	#0f172a
Core #33	Pin/Core 9	#eab308
Core #34	Pin/Core 10	#7c3aed
Core #35	Pin/Core 11	#ec4899
Core #36	Pin/Core 12	#06b6d4

RJ45 LAN Pinout Table & PoE Pin Mapping

RJ45 Pin Number	Ethernet Signal Function	PoE Power Allocation
Pin 1	BI_DA+ (TX+)	DC+ (PoE Mode A)
Pin 2	BI_DA- (TX-)	DC+ (PoE Mode A)
Pin 3	BI_DB+ (RX+)	DC- (PoE Mode A)
Pin 4	BI_DC+ (Gigabit)	DC+ (PoE Mode B)
Pin 5	BI_DC- (Gigabit)	DC+ (PoE Mode B)
Pin 6	BI_DB- (RX-)	DC- (PoE Mode A)
Pin 7	BI_DD+ (Gigabit)	DC- (PoE Mode B)
Pin 8	BI_DD- (Gigabit)	DC- (PoE Mode B)

🔬Fiber Loose-Tube Cross-Section & RJ45 Pinout Visualizer

TIA-598C / TIA-568-T568B

Penampang Tube #3

Active selected core: #3 (Core #3 (di dalam Tube): Hijau (Green) (Solid))

RJ45 Connector — T568B Standard

Pinout order: 1 (White/Orange) to 8 (Brown) — Gigabit & PoE Ready

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How to Use This Tool

Enter your target optical fiber core number (1 to 288 cores) and select your cable's core density per loose tube (6, 12, or 24 cores).
Choose your preferred copper RJ45 wiring standard (commercial standard T568B, residential T568A, or Ethernet Crossover).
Inspect the interactive loose-tube cross-section SVG, identify the exact fiber and tube color pairings, and review the 8-pin RJ45 pinout and PoE power table.

Worked Example: Tracing Core #27 on 48-Core Trunk Cable & T568B Pinout

Computed example: Core number 27 within a 48-core cable (12 cores/tube) resides inside Tube #3 (Solid Green) at core position #3 (Green). For T568B LAN cabling, Pins 1-2 utilize the White-Orange/Orange pair providing PoE Mode A positive DC voltage.

Example Input

Target Core Number to Trace (1–288): 27
Cores Count per Loose Tube: 12 Cores per Tube (Industry Standard)
Total Cable Core Capacity: 48 Cores (4 Tubes)
RJ45 Pinout Wiring Standard: T568B (Commercial / Standard)

Calculated Output

Selected Core Number: 27
Loose Tube Number: 3
Core Position in Tube: 3
Tube Color (TIA-598C): Tube #3: Hijau (Green) (Solid)
Fiber / Core Color (TIA-598C): Core #3 (di dalam Tube): Hijau (Green) (Solid)
Tube Hex Color Code: #16a34a
Core Hex Color Code: #16a34a
Total Tube Count in Cable: 4
Selected RJ45 Wiring Standard: T568B

12-Core Sequence Table in Selected Tube

Global Core Number	Position in Tube	Hex Color Code
Core #25	Pin/Core 1	#2563eb
Core #26	Pin/Core 2	#f97316
Core #27	Pin/Core 3	#16a34a
Core #28	Pin/Core 4	#78350f
Core #29	Pin/Core 5	#64748b
Core #30	Pin/Core 6	#f8fafc
Core #31	Pin/Core 7	#dc2626
Core #32	Pin/Core 8	#0f172a
Core #33	Pin/Core 9	#eab308
Core #34	Pin/Core 10	#7c3aed
Core #35	Pin/Core 11	#ec4899
Core #36	Pin/Core 12	#06b6d4

RJ45 LAN Pinout Table & PoE Pin Mapping

RJ45 Pin Number	Ethernet Signal Function	PoE Power Allocation
Pin 1	BI_DA+ (TX+)	DC+ (PoE Mode A)
Pin 2	BI_DA- (TX-)	DC+ (PoE Mode A)
Pin 3	BI_DB+ (RX+)	DC- (PoE Mode A)
Pin 4	BI_DC+ (Gigabit)	DC+ (PoE Mode B)
Pin 5	BI_DC- (Gigabit)	DC+ (PoE Mode B)
Pin 6	BI_DB- (RX-)	DC- (PoE Mode A)
Pin 7	BI_DD+ (Gigabit)	DC- (PoE Mode B)
Pin 8	BI_DD- (Gigabit)	DC- (PoE Mode B)

Core Concept & Engineering Notes

Standardized color coding across optical fiber infrastructures and twisted-pair copper Ethernet cabling (RJ45) underpins the structural integrity of modern enterprise data networks and telecommunications. Precise wire mapping is paramount during field fusion splicing, optical patch bay terminations, and high-wattage Power over Ethernet (PoE) hardware deployments. For multi-fiber loose-tube cables, the global telecommunications sector adheres to the ANSI/TIA-598-C and TIA-598-D specifications. This standard governs a standardized 12-color sequence for optical fibers: 1-Blue, 2-Orange, 3-Green, 4-Brown, 5-Slate (Gray), 6-White, 7-Red, 8-Black, 9-Yellow, 10-Violet, 11-Rose (Pink), and 12-Aqua. High-strand-count trunk cables (24, 48, 96, 144, up to 288 cores) group glass fibers into color-coded plastic loose tubes that replicate the identical 12-color progression. For installations exceeding 144 cores, subsequent buffer tubes incorporate black tracer stripes or intermittent ring markings to prevent transposition errors during splicing. In structured copper Ethernet cabling (Cat5e, Cat6, Cat6A), ANSI/TIA-568.2-D governs the two pinout wiring standards: T568A and T568B. T568B represents the dominant commercial wiring topology deployed across data centers and corporate campuses, following the sequence: 1-White/Orange, 2-Orange, 3-White/Green, 4-Blue, 5-White/Blue, 6-Green, 7-White/Brown, and 8-Brown. Accurate pair alignment is mandatory for Power over Ethernet (IEEE 802.3af/at/bt) compliance: PoE Mode A delivers DC power concurrently over data pairs 1-2 (positive) and 3-6 (negative), whereas PoE Mode B transmits power over spare pairs 4-5 (positive) and 7-8 (negative). Wiring mismatches degrade differential pair cancellation, elevate near-end crosstalk (NEXT), and can cause hardware damage on active PoE ports.

How It Was Calculated (Formulas & Steps)

Mathematical Formulas

Buffer Tube Number = ceil(Core Number ÷ Cores per Tube)
Core Position in Tube = ((Core Number - 1) mod Cores per Tube) + 1
TIA-598 Sequence: Blue, Orange, Green, Brown, Slate, White, Red, Black, Yellow, Violet, Rose, Aqua
PoE Mode A (Endspan): DC Power on Pins 1, 2 (+) and Pins 3, 6 (-)
PoE Mode B (Midspan): DC Power on Pins 4, 5 (+) and Pins 7, 8 (-)

Frequently Asked Questions (FAQ)

What is the practical difference between T568A and T568B LAN cabling?

Electrically and in data throughput, both standards perform identically. The distinction lies in swapping the positions of the Orange pair (Pins 1-2 on T568B) and Green pair (Pins 1-2 on T568A). T568B is the universal commercial standard.

How do you determine fiber color codes for core numbers above 12?

Apply division arithmetic: Buffer Tube Number = Ceil(Core / Cores Per Tube). Relative Core Position in Tube = (Core - 1) MOD Cores Per Tube + 1. Every individual buffer tube replicates the identical 12-color TIA-598 sequence.

What is the difference between PoE Mode A and PoE Mode B on RJ45 cables?

PoE Mode A (Endspan) delivers DC electrical power simultaneously over active data pairs on Pins 1, 2, 3, and 6. PoE Mode B (Midspan) delivers DC voltage exclusively over spare conductor pairs on Pins 4, 5 (positive) and 7, 8 (negative).

Why does a straight-through T568B cable work when connecting two modern switches?

Modern network interfaces incorporate automated Auto MDI/MDI-X switching logic. Hardware PHY chips automatically detect transmit and receive polarities and invert TX/RX differential lines internally without requiring crossover cables.

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References & Notes

Last updated: 2026-11-07Technically Verified · Industry Standard

Note: Results above are mathematical estimates based on standard formulas. Always verify against official vendor documentation and site conditions before production deployment.