Shielded twisted pair cable Advantages And Disadvantages




Shielded twisted pair cable:


Has a shield to protect from EMI
Good for higher data rates.




STP:


Type 1: two pair 22-AWG( American wire gauge) = 4.1 mm
Type 2: four pairs of type 1
Type 6: two pairs of 26 AWG STP
Type 7: one pair of 26 AWG STP
Type 9:  one 26 AWG STP.



Advantages of Twisted pair:


Low cost
Easy to install
High speed
Effective to EMI

Disadvantages of Twisted pair:

High attenuation
Short distance less than 100m




Twisted pair cable:
                            


         






Two strands of copper wire twisted around each other
Also covered by plastic insulation
Easy to install and inexpensive
Noisy and interrupted by magnetic field



Unshielded Twisted Pair (UTP)






UTP:
IMPEDENCE=100 OHM
Voice grade and data grade
Very low cost
Two pairs (RJ-11 ) or four pairs (RJ-45)

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