t568a
RJ-11 is the standard connector utilized on 2-pair (4-wire) telephone wiring
On mine, there are a pair of horns. The push in connector goes into the first horn has a black and a greeen pair of wires. Wiring goes from the first horn to the second with two black wires.
Twisted pair wires are rated by the American Wire Gauge (AWG) standard
Near end crosstalk
RJ11(Registered Jack-11) has 4 to 6 pins. Generally 4 ports are there in RJ11.
A USB Cable can have multiple types of plug ends which are called connectors (Standard-A, Standard-B, Mini-B, Micro-A, Micro-B, and Micro-AB). Obviously there are wires between the two connectors and they are: One wire contains a path for a 5V power supply Two wires are twisted-pair data wires One wire is the ground
a usb cable has four wires, two for power and two for communication.
There are 4 pairs, 8 wires in total.
It depends on the type of wire and what it's being used for. The two most common types of phone wire, also called twisted pair cable are Cat3 and Cat5 Cat3 contains two twisted pairs (4 wires) most often coloured: Green twisted with Red Yellow twisted with Black OR White/Blue twisted with solid Blue White/Orange twisted with solid Orange Cat5 contains four twister pairs (8 wires) most often coloured: White/Blue twisted with solid Blue White/Orange twisted with solid Orange White/Green twisted with solid Green White/Brown twisted with solid Brown Cat3 can carry 2 separate phone lines and Cat5 can carry up to 4, but can also be used to carry data. A standard phone wire carrying 1 phone line will only use the primary pair being Green/Red or the White/Blue combination. A phone capable of using two lines with a single wire may employ both pairs, the second being the Yellow/Black or White/Orange combination. There is a polarity to the wires as well, known as Tip and Ring. If you find two types of wiring or using different colours, use the following to properly pair them. Tip Ring ----------------------------------- Green Red Yellow Black White/Stripe Solid If you're going to be splicing these wires, its adviced to have no more than 3-4 wires twisted together at a time and properly capped, not just taped up with electrical tape, as it will not hold the wires together securely. As well, some terminal blocks and wallplates use screw down terminals, do not put more than 2 wires on a single terminal as the wires tend to break easily.
cross talk
The colors only matter if you are trying to pair up to an already headed end. Whats more important is the pins you use. For cat5e and normal 10/100 ethernet you only use pins 1,2,3,and 6. Cat5e has 4 paired wires (orange-white / orange/ blue-white / blue / green-white / green / brown-white / brown) A typical standard head is colored this way, starting from pin 1-8: 1) orange-white 2) orange 3) green-white 4) blue 5) blue-white 6) green 7) brown-white 8) brown So, its possible to use the orange pair, and green pair for one outlet, then re-wire the blue pair and brown pair to the second outlet as long as its headed to use pins 1,2,3,6 on both ends.
4 pairs of wires, or 8 wires total