A twisted pair can be used as a balanced line, which as part of a balanced circuit can greatly reduce the effect of noise currents induced on the line by coupling of electric or magnetic fields. The idea is that the currents induced in … See more

Unshielded twisted pair (UTP) cables are found in many Ethernet networks and telephone systems. For indoor telephone applications, UTP is often grouped into sets of 25 pairs according to a standard 25-pair color code originally developed by AT&T Corporation See more

Twisted pair cables may incorporate shielding in an attempt to prevent electromagnetic interference. Shielding provides an … See more

Twisted pair has the following useful attributes:
• Electrical noise going into or coming from the cable can be prevented.
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The earliest telephones used telegraph lines which were single-wire earth return circuits. In the 1880s electric trams were installed in many cities, which induced noise into these … See more

Analog telephone
Before digital communication and Ethernet became widespread there was no international standard for telephone cable. Standards were set at a national level. For instance, in the UK the General Post Office specified CW1293 … See more

• ANSI/TIA-568
• Balanced line
• Copper wire and cable
• Ethernet over twisted pair
• Litz wire See more