Fiber & Optical Demystified

Fiber & Optical Demystified

Optička oprema


2 x LevelOne IFE-0501, 4-Port PoE + 1-Port SC Multi-mode

SC connector
Industrial Fast Ethernet Switch

SPF cards / GBIC

2 x SFP modul Single-mode, SX conector

JDS Uniphase (
SFP Optical Transceiver GBIC
Fiber connector type: 1000Base-SX
Model: 200/100-M5/M6-SN-I
JSH-21S3AA1 / JSH-21S3AA2
PN: 64P0205 / 64P0314

Connectors: SC na uređaju, X na patch panelu Patch cable: Single-mode SC to X

Fiber segment using multi-mode connector type must use

What is SPF?

Small form-factor pluggable (SFP) also called Mini-GBIC.

Small form-factor pluggable transceiver

How to recognize fiber cable?

  • by diameter?
    Multi mode: 50/125μm ~ 62.5/125μm
    Single mode: 9/125μm

  • by color?
    Single-mode: cable color is usually yellow, and connector is blue

  • different range
    Usually, applications are ~2km for multi-mode, ~30km for single-mode.

  • 1000Base-SX is : multi-mode fiber cable caonnector

  • 1000Base-LX is : single-mode fibre

Kablovi sa slikama

Fiber optic connector types?

FC connector is smaller compared to the SC. SC has two voids (void = vođica) and two hooks to connect in connector. FC has one.

  • Duplex-connectors are just two simplex connectors together. Can be FC or SC.

Fiber Optic Connectors Gigabit Ethernet

sg-sca konektor

sca konektor

Kabl je x: singlemode


SC is a snap-in connector also with a 2.5 mm ferrule that is widely used for it’s excellent performance. It was the connector standardized in TIA-568-A, but was not widely used at first because it was twice as expensive as a ST. Now it’s only a bit more expensive and much more common It’s a snap-in connector that latches with a simple push-pull motion. It is also available in a duplex configuration.

Fiber Cable Type

Multimode or singlemode.

Fiber Connector Type



How to recognize if cable is multimode or singlemode?


Optical cables

Kabl je definitivno Single Mode Fiber G652D

date 01. Jan 0001 | modified 17. Jan 2023
filename: Fiber & Optical Demystified