What is NSDL and CDSL

Internet What is ADSL?


Asymmetric Digital Subscriber Line (ADSL) is a type of DSL technology that is used to connect to the Internet. With ADSL, more data can be sent over existing copper lines compared to conventional modem lines. In this tipps + tricks article, you can find out what that means for you as a customer, in addition to higher bandwidth.

What is ADSL?

ADSL is a transmission method for a broadband Internet connection via the telephone lines already available in the house. With the introduction of ADSL, the decisive advantage was that the existing telephone connections could continue to be used while ADSL was being used. Important for you to note: The term "ADSL" is only used by experts and is synonymous with the actual DSL (D.igital S.subscriber L.ine). The full name "A.symmetric D.igital S.subscriber L.ine"Basically only means that upload and download speeds are asymmetrical, that is, they differ.

For example, if you do a speed test of your Internet speed, you will see that download and upload differ in their bandwidth. ADSL connections enable download speeds of up to 8 Mbit / s and upload speeds of up to 1 Mbit / s. The older ADSL has now been replaced by newer technologies such as ADSL2 and ADSL2 +. Download speeds of 12 Mbit / s to a maximum of 24 Mbit / s can be achieved here.

What is the difference between ADSL, VDSL and DSL?

In addition to ADSL and its further development, ADSL2, there is also VDSL and DSL. ADSL and classic DSL are mostly used synonymously and provide the Internet via copper cables. On the one hand, this worsens the signal quality and, as the distance to the exchange increases, it can result in losses in the download. Do you share your ADSL connection with several people? This can also have a negative effect on the speed.

VDSL stands for V.ery High S.peed D.igital S.subscriber L.ine and is a DSL technology that delivers significantly higher data transmission rates than ADSL or ADSL2. For the last piece to the customer, VDSL uses a so-called cable splitter, which is connected to the fiber optic network. Copper lines are only used for the last stretch to the customer. This compensates for signal interference and loss of speed and speeds of up to 100 Mbit / s in the download and up to 40 Mbit / s in the upload - VDSL is correspondingly fast. You can use the DSL availability tool on telekom.de to test whether VDSL is available at your location. If you are offered speeds higher than 24 Mbit / s, VDSL is available at your location.