tranquility
Senior Member
I think you are mistaken on the distance.tranquility I live eight miles from the central switching office where land line telephone services come from and I have DSL too , the second level of service.
5280 feet per mile. 8 miles. 42,240 feet.
http://www.dslreports.com/faq/4676
http://computer.howstuffworks.com/dsl1.htmless than 5000 You will have little trouble getting all speeds of DSL
5000-10600 You may have trouble getting the highest speeds on offer
10600-15000 The danger zone for DSL from national CLECs like Covad and NorthPoint. Speeds on offer are pinned back steadily until they reach 192k for 15,000 feet. If your line is longer than around 15000 feet, they may not accept an order.
15000-18000 In this range, Telco ADSL is normally still available, although it may be restricted to 300-500k speeds
18000-22000 Telco ADSL is not available, although in a few areas, RADSL may be a product you can get. RADSL is speed-variable.
Some smaller DSL specialist CLECs may have solutions for you.
22000-28000 Using less commonly used DSL equipment, it is still possible to use lines of this length.
18000-28000 IDSL is an alternative or possibly the only alternative. IDSL is 144k/sec, about four-six times modem speed.
28000-38000 IDSL is the only alternative
http://compnetworking.about.com/od/dsldigitalsubscriberline/a/availability.htmPrecisely how much benefit you see from ADSL will greatly depend on how far you are from the central office of the company providing the ADSL service. ADSL is a distance-sensitive technology: As the connection's length increases, the signal quality decreases and the connection speed goes down. The limit for ADSL service is 18,000 feet (5,460 meters), though for speed and quality of service reasons many ADSL providers place a lower limit on the distances for the service. At the extremes of the distance limits, ADSL customers may see speeds far below the promised maximums, while customers nearer the central office have faster connections and may see extremely high speeds in the future. ADSL technology can provide maximum downstream (Internet to customer) speeds of up to 8 megabits per second (Mbps) at a distance of about 6,000 feet (1,820 meters), and upstream speeds of up to 640 kilobits per second (Kbps). In practice, the best speeds widely offered today are 1.5 Mbps downstream, with upstream speeds varying between 64 and 640 Kbps. Some vast improvements to ADSL are available in some areas through services called ASDL2 and ASDL2+. ASDL2 increases downstream to 12 Mbps and upstream to 1 Mbps, and ASDL2+ is even better -- it improves downstream to as much as 24 Mbps and upstream to 3 Mbps.*
http://whatis.techtarget.com/reference/Fast-Guide-to-DSL-Digital-Subscriber-LineDistance limitation - DSL technology is distance sensitive. In short, it means your residence must be located within a certain distance (traditionally about 18000 ft. / 5 km) away from the local phone company hub (called a central office or public exchange). In rare cases, your neighbor around the corner may be eligible for DSL but you cannot, due to this distance limitation. This is also why people living in rural areas cannot subscribe to DSL service.
http://blog.directcom.com/2012/04/23/are-there-any-limitations-to-dsl-service/DSL Type Description Data Rate
Downstream;
Upstream Distance Limit Application
IDSL ISDN Digital Subscriber Line 128 Kbps 18,000 feet on 24 gauge wire Similar to the ISDN BRI service but data only (no voice on the same line)
CDSL Consumer DSL
from Rockwell 1 Mbps downstream; less upstream 18,000 feet on 24 gauge wire Splitterless home and small business service; similar to DSL Lite
DSL Lite (same as G.Lite) "Splitterless" DSL without the "truck roll" From 1.544 Mbps to 6 Mbps downstream, depending on the subscribed service 18,000 feet on 24 gauge wire The standard ADSL; sacrifices speed for not having to install a splitter at the user's home or business
G.Lite (same as DSL Lite) "Splitterless" DSL without the "truck roll" From 1.544 Mbps to 6 Mbps , depending on the subscribed service 18,000 feet on 24 gauge wire The standard ADSL; sacrifices speed for not having to install a splitter at the user's home or business
HDSL High bit-rate Digital Subscriber Line 1.544 Mbps duplex on two twisted-pair lines;
2.048 Mbps duplex on three twisted-pair lines 12,000 feet on 24 gauge wire T1/E1 service between server and phone company or within a company;
WAN, LAN, server access
SDSL Symmetric DSL 1.544 Mbps duplex (U.S. and Canada); 2.048 Mbps (Europe) on a single duplex line downstream and upstream 12,000 feet on 24 gauge wire Same as for HDSL but requiring only one line of twisted-pair
ADSL Asymmetric Digital Subscriber Line 1.544 to 6.1 Mbps downstream;
16 to 640 Kbps upstream 1.544 Mbps at 18,000 feet;
2.048 Mbps at 16,000 feet;
6.312 Mpbs at 12,000 feet;
8.448 Mbps at 9,000 feet Used for Internet and Web access, motion video, video on demand, remote LAN access
RADSL Rate-Adaptive DSL from Westell Adapted to the line, 640 Kbps to 2.2 Mbps downstream; 272 Kbps to 1.088 Mbps upstream Not provided Similar to ADSL
UDSL Unidirectional DSL proposed by a company in Europe Not known Not known Similar to HDSL
VDSL Very high Digital Subscriber Line 12.9 to 52.8 Mbps downstream;
1.5 to 2.3 Mbps upstream;
1.6 Mbps to 2.3 Mbps downstream 4,500 feet at 12.96 Mbps;
3,000 feet at 25.82 Mbps; 1,000 feet at 51.84 Mbps ATM networks;
Fiber to the Neighborhood
Signals degrade over long distances. That is just a law of nature. Copper is a good conductor, but it’s not a perfect conductor. Inside any metal line, there is resistance as the electronic waves travel through the metal. Because of this fact, there is a limit to how far DSL can travel from the main telephone switch. Usually it can only go 2 or 3 miles at the most before you need to build another office to repeat that signal. A regular analog telephone conversation can be pushed out much further, because signal degradation is not as critical, but to deliver internet data , with the digital packets being sent in very precise, technical ways, any kind of interference, loss of signal or degradation is going to cause problems.