Let's take a quick look at the difference between shielded twisted pair cables and some twisted pair alternatives: (This is why users may sometimes find, when they carry their laptop to another location, that the wall jack connections don't match their plug when not connecting to a LAN wirelessly.) What is the difference between STP, FTP and S/FTP, and UTP? The wall jack these cables attached to can have as many five kinds of hole arrangements or pinouts, depending on the kinds of wire the installation expects will be plugged in - for example, digital, analog or LAN. It is a side-by-side wire known as silver satin. The telephone or Ethernet cable bought at a local hardware store to connect a phone or computer to a wall jack is not the same as unshielded or shielded twisted pair cable. How does a shielded twisted pair differ from Ethernet or telephone cable? In electrically noisy business environments, shielded twisted pair uses RS-449, RJ-45, RS-232 and RJ-11 connectors to maximize the reduction of interference. Coax and fiber optic cabling are the main alternatives to twisted pair. So, the color-coding makes it easier to differentiate between pairs.Īlthough twisted pair is often associated with home use, businesses often use a higher grade of twisted pair for horizontal wiring in LAN installations because it is less expensive than a coaxial (coax) cable. Different uses, such as analog, digital and Ethernet, require different pair multiples. Twisted pair, be it UTP or STP, also comes with each pair uniquely color-coded when it is packaged in multiple pairs. The extra pair makes it possible to add another line - perhaps for modem use - when needed. Businesses often use shielded twisted pair in their cabling system installations, while the more common kind of wire installed in homes is UTP.įrequently, twisted pair is now installed with two pairs of cables to the home. Since some telephone sets or desktop locations require multiple connections, twisted pair wiring is sometimes installed in two or more pairs - all within a single cable. How is shielded twisted pair wiring installed?
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