This chart represents the T568B wiring scheme, which is commonly used in Ethernet networks. The wire colors correspond to the individual wires inside the network cable, and the pin numbers represent the pinout order on an 8P8C (RJ45) connector.

T568A and T568B diagram

The terms "568A" and "568B" refer to two different wiring standards used in Ethernet cable connections, specifically for the termination of twisted pair cables, such as Category 5 (Cat5) or Category 6 (Cat6) cables. These standards specify the arrangement of the individual wire pairs within the cable's connector.

While the physical arrangement of the wire pairs differs between 568A and 568B, it's important to note that both standards are functionally equivalent. The main purpose of these standards is to ensure consistency and compatibility in Ethernet installations. As long as both ends of an Ethernet cable are terminated using the same standard (either 568A or 568B), the cable will work correctly for data transmission.

Networking Cabling Types and Specifications

Ethernet Cables (Cat5e/Cat6/Cat6a)

Fiber Optic Cables (Single-mode/Multi-mode)

IP Subnet Calculation

Bandwidth Calculation

PoE Power Budget Calculator

Calculate if the power budget is sufficient for the connected PoE devices.

Total Power Consumption:

PoE Voltage Drop Calculator

Calculate the voltage drop in a PoE installation.

Voltage Drop:

PoE Injector/Switch Selection Calculator

Recommend suitable PoE injector or switch based on power requirements.

Total Power Required:

Recommended Switch:

Recommended Injector:

PoE Maximum Cable Length Calculator

***Beta Version***

Calculate the maximum cable length for a given power requirement.

Maximum Cable Length:

Fiber Optic

Fiber Optic Bend Radius Chart

Fiber optic bend radius charts provide guidelines for the minimum bend radius that should be maintained when installing or handling fiber optic cables. These charts help ensure that the cables are not bent too tightly, which can cause signal loss or damage to the fibers. It is important to consult the specific bend radius chart provided by the cable manufacturer for accurate information.

Bend Radius Mode Conditioned Multimode Fiber (MMF) Single Mode Fiber (SMF)
Minimum Bend Radius 15 times the outer diameter of the fiber cable 10 times the outer diameter of the fiber cable
Recommended Bend Radius 25 times the outer diameter of the fiber cable 20 times the outer diameter of the fiber cable

Bend Radius Calculator


R = (E * r) / (S * (R + Cth + r))

Formula Breakdown:

Parameter Input: