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UTP(Unshielded Twisted Pair) Cable

Cat3, Cat5, Cat5e, Cat6
Weakness on Electromagnetic Interference(EMI)
Installation Guide

- Avoid direct sunshine and humidity
- Enough distance from device in Electromagnetic environment
- Maximum distance
- Length of untwisted cable portion in the end is 11mm~13mm
- Length of opened sheath is less than 25mm
- Tensile of the cable is less than 11Kg
- Do not repair damaged cable
- Do not ban cable over 90 degree

STP(Shield Twisted Pair) Cable

Double covering cable
Cat7
Support higher bandwidth than UTP

Fiber Optic cable

Multi-mode cable

- Wide core size allows multiple fiber signals
- Core diameter is 62.5/125 micron
- Max distance is up to 5Km

Single- mode cable

- Narrow core size allows single fiber signal
- Core diameter is 5~10 micron
- Support long distance and high bandwidth

- Propagation Delay

Propagation delay is amount of time it takes for a certain number of bits to be transferred thru a medium.

- Delay Skew;

Difference in time required by a signal to propagate in the same cable due to differences in the physical lengths of the pairs caused by different twist ratios. On UTP cables, there is 4 pairs cables, but none of pair has same physical lngths

- NEXT, Near-end crosstalk

Near-end Crosstalk is interference between two pairs of a cable measured at the same end of the cable as the transmitter.  Crosstalk can be referred to electromagnetic interference from one unshielded twisted pair to another .