DSL stands for Digital Subscriber Line, which is an internet network that uses telephone lines to transmit digital data. Users get a high speed bandwidth connection from a phone wall jack on an existing telephone network. DSL works within the frequencies that the telephone doesn’t so you can use the Internet while making phone calls. Because it is built on existing phone lines, DSL is widely available. It costs less than satellite or broadband Internet connections.
The most common type of DSL residential service is ADSL, the asymmetric DSL. In this type of DSL Internet service, the data transfer speed is higher in one direction, generally downloads. This means that it is likely that DSL Internet plans offer faster download speeds than uploading speeds.
Other common types of DSL service include SDSL, which has symmetric loading and unloading speeds, and VDSL, which has a "very high" data transfer speed.
Main DSL internet providers
Since DSL uses telephone cables, it makes sense that the largest providers are telephone companies. AT&T is the largest telecommunications company in the world and also the largest provider of DSL services. Verizon and Centurylink are also important DSL providers.
AT&T: available in 21 states with major service areas in the south, midwest and parts of Nevada and CaliforniaCenturyLink: available in 35 states with main service areas in the west, middle west and southeastFrontier: available in 29 states with main service areas in the west, northwest of the Pacific, midwest, northeastern and Appalachian regionsVerizon: available in new states with main service areas in the northeast and the middle AtlanticWindstream: available in 18 states with major service areas in the Greater Llanuras, Middle West and South regions
DSL internet benefits
High availability: DSL is one of the most available types of Internet services and covers approximately 87% of EE. UU.Low cost: Since DSL uses existing telephone lines, costs are lower than Internet via cable or fiber optics.Consistency of speed: it is less likely that DSL Internet will experience slow speeds and delays during times of peak use.Easy installation: your DSL modem connects to a phone socket, which makes installation quick and easy.
DSL internet disadvantagesLow speeds: telephone lines are not compatible with the largest bandwidth that obtains cable or fiber, so DSL Internet will generally not offer the fastest available speeds. Actual download speeds are typically slower than the “up-to” speeds that providers advertise.Speed wear: when more ISPs are using the ISP, the extender is likely to decrease their speed.Fewer package options: DSL Internet providers are available on ofrezcan TV services in your area, which means that you have to build a TV and Internet package with the providers.Distance: A DSL connection works better when you are closer to the provider's central office. The farther away you get from the central office, the weaker the signal becomes.
You don't need a lot of equipment for DSL Internet. The major part will be provided by your ISP in anyway.DSL Modem – This is a special modem for DSL internet only. The internet provider usually supplies this, and sometimes the router too. Keep in mind that one modem might not work with other ISPs, so if you change services you’ll probably need to switch. Also worth noting is that the modem from the ISP is usually leased, so it might be worth looking into buying your own.Line Splitter – The line splitter plugs into your phone line, and has two connections – one for your phone and the other for the DSL. This separates the data from one connection to the next, which helps to speed things up.