Quad Twisted Pair is moving 4 channels of Analog or AES audio over Category Networking cables.

Cat5e, Cat 6 UTP, S/UTP, STP, S/STP are all considered Quad Twisted Pair:

Most audio Installations use shielded microphone cable for transmitting, this practice is overkill in most installations:

If the transmitter and the receiver are differentially balanced, the shield is not necessary for transmission:

 

Within Quad Twisted Pair, the different twisting ratios within Cat 5e and Cat 6, Crosstalk is nonexistent.

Because of these properties, Category cable is perfect for moving properly balanced line level and AES signals.

Quad Twisted Pair products are wired according to this pin out using world Standard TIA/EIA-568-B.1-2001 T568B Wiring

There are some limitations and things to keep in mind for your system: