Loop resistance is determined by the wire gauge which engineers select. All telecommunication phone systems are limited to the loop resistance range they can tolerate. The cable gauge is to provide the desired resistance at the maximum temperature under which the system will tolerate also known as resistance design. Range is limited by the range of the CO such as the range which ringing can be supplied and tripped on answer. CO's normally have a loop resistance range from 1,300 to 1,500 ohms or more and PBX's have less which is about 400 to 800 ohms. A second consideration for selecting cables is the capacitance of the pair which is defined in microfarads per mile also referred to as (mf). An average customer's loop will normally have a high capacitance of 0.083 mf per mile.

Feeder cable and distribution cable divide the cable plant in half. Feeder cable routes cable pairs directly to an area with no intervention. Main feeders are backbone cables that leave the CO and are routed through a conduit to branching points. Branch feeders is a smaller cable that route pairs from the main feeder to the serving area. The distribution cable goes from the serving area to the customer. The distribution cable is terminated in terminals that may be on ground pedestals, buildings, aerial cable messenger, or underground. In an aerial or buried

Some common words found in the essay are:
Plant Outside, aerial cable, loop resistance, outside plant, distribution cable, cable pairs, feeder cable, local loop, cable distribution cable, customer local loop, loop resistance range, drop wire, resistance range, feeder cable distribution, customer local,
Approximate Word count = 911
Approximate Pages = 4 (250 words per page double spaced)