It describes every aspect of cable installation for both voice and data communication. Used for ISDN, 568A assigns Pair 2 to Pins 3 and 6 and Pair 3 to Pins 1 and 2. It is also a subset specified by the IEEE 802.3 10Base-T Ethernet over twisted pair standard. The ability of an electronic device to operate in its intended environment without its performance being affected by EMI and without generating EMI that will affect other equipment. The term most often used to designate electrical pressure that exists between two points and is capable of producing a flow of current when a closed circuit is connected between the two points.
Voltage is measured in volts, millivolts, microvolts and kilovolts.
A standards organization in the U.S. specializing in the electrical and functional characteristics of interface equipment. Environmentally Sealed A unit is provided with gaskets, seals, grommets, potting or other means to keep out moisture, dust,, air or dirt which might reduce or impair its performance. A control character transmitted as a request for identification or status in the protocols. Equalizer A device used by modems to compensate for distortions caused by telephone line conditions. Ethernet A network standard first developed by Xerox, refined by DEC and Intel, and codified as the IEEE 802.3 standard.