The major limitation of ethernet over copper at this time is distance from the central office (CO). To ensure circuit strength and reliability, most providers limit this distance of EoC availability to 11000 feet. A few providers offer slightly higher distance limitations. However, in general, only customers who are within 11000 feet of a CO that is lit (with fiber) for Ethernet, can receive 10 mbps ethernet over copper. For this reason, EoC is far more available in urban areas and less available for businesses which are located in rural areas.
Ethernet can be delivered over DS1, DS3 , and wirelessly. Ethernet over DS1 (EoDS1) is delivered over 7 DS1 circuits. EoDS1 also provides 10 mbps, but is a little more expensive than EoC because the cost of DS1 loops must be calculated into the price. The great advantage of EoDS1 over EoC is that EoDS1 can be delivered to far more business locations because EoDS1 has no distance limitation from CO, other than loop cost. Generally, the longer the loop, the higher the cost. Ethernet over DS3 (EoDS3) provides ethernet service over DS3 circuits. EoDS3 can provide data transfer at 44, 88, or 100 mbps. Another big advantage of EoDS3 is that on premise routers are far less expensive to purchase, configure, and maintain than regular DS3 routers. Most telecom providers will install EoC for free with three year term contracts. There are almost never extra build-out costs required for installation of EoC.