These are all industry standards for Ethernet Network applications. Cabling requirements for all are standard as follows: UTP, Unshielded Twisted Pair Wire for: CAT5/CAT5E, CAT6 (except CAT7 is recommended to use STP, Shielded Twisted Pair Wire, these all utilize an RJ45 8 Pin Connector. Transfer rates (speed) are rated in MHZ (megahertz): CAT5/CAT5E = rated at 100 MHZ, CAT6 = rated at 250 MHZ, CAT7= rated at 600 MHZ. Generally, straight through cables are referred to as a patch cable. Crossover cables (pier to pier) are normally used to connect a PC to another PC. Also comes in Couplers to connect cables together
RJ11/12 and RJ45 ADAPTERS-These come in many different forms : RJ11/RJ12 and RJ45 to a D-Sub 9 pin or D-sub 25 pin (known as a Modular adapters, RJ11 is a 2 or 4 Cond, RJ12 is can be a 4 cond or 6 cond, RJ45 normally an 8 conductor, the amount of wires used will depend on the application
A keystone jack is a modular female connector it can come in an RJ11/12 form or an RJ45. The common application is for data communications, particularly local area networks (LANs). The jack is usually mounted in a wall plate or patch panel. A keystone plug is the matching male connector, usually attached to the end of a cable or cord.
Punch down tool was designed to assist in terminating wires properly into a Telephone terminal block. The two most common types of telephone punch down terminals are the 66/110 and the 88 type modules, which these take two different punch down blades in the tool.