"A"
"B"
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
Twisted Pair Cable
TWISTED PAIR. A line consisting of two insulated wires twisted together to form a flexible line without the use of spacers. Different types of cables will vary the wire gauge [AWG] for the inner conductors and there twist, the number of times the wires are twisted per inch. The Braid or shield [outer conductor in the diagram] also varies with different cables by coverage and number of braids. The shield may also be a foil instead of a braid.
Shielded Twisted Pair Cable
Electrical Characteristics to account for; Characteristic Impedance, Attenuation, and Capacitance.
Twisted pair cables may be shielded or un-shielded. The diagram above shows an example of a shielded twisted pair cable [STP]. Twisted pair cables with out a shield are called Unshielded Twisted Pairs [UTP]. By definition a twisted pair cable is a multi-conductor cable, and normally a round cable
Military Standards: MIL-C-17
Interface Bus Standards: EIA-485 is one of many electrical interface buses that required Twisted Pair cables.
Refer here for Manufacturers of Wire and Cable
