ADSL Full Form

What Is The Full Form Of ADSL?

The full form of ADSL is Asymmetric Digital Subscriber Line

ADSL is a type of DSL comm technology that offers greater bandwidth and faster speeds than dial-up connections. It allows more and better data transmission over copper telephone lines compared to modem lines. It is an old type of broadband, mainly used in homes and businesses. 

ADSL is typically designed to support the home Internet users who frequently download instead of uploading data. An ADSL uses a majority of its capacity for transmitting the signals downstream for a better speed and faster download. The word asymmetrical in ADSL refers to this behavior. 

History Of ADSL 

  • Bellcore developed a DSL variation in the 1980s, called the High bit-rate DSL (HDSL). It gave the same bandwidth for upload and download. 
  • HDSL had a huge disadvantage- it required multiple phone lines. 
  • Joseph Lechleide, in the late 1980s, demonstrated higher bandwidth and better download speeds with an asymmetry in sending broadband signals. 
  • The transition from analog to digital signals required high deployment costs. They were out for public use only in the late 1990s. 
  • ADSL got popular in the late 2000s, and almost all techs have upgraded to support it now. 

Characteristics Of ADSL 

  • It provides the transmission of both- data and voice using a single telephone line (copper). 
  • Service providers need to install a modem to allow data traffic between the available lines for ADSL. 
  • The speed of data transfer varies among different operators. 
  • It runs through the BT phone line networks. 
  • ADSL allows a person to access the internet and make phone calls at the same time. 
  • ADSL speeds can reach up to 6 Mbps. Usually, they receive 512 Kbps upload & 2 Mbps download speeds. 

Types Of ADSL Transmission Lines 

  • Data transmission channel – It is used to send the user’s data and info to the Internet ( when uploading).
  • Data reception channel – It is used to receive data and info from the Internet to the user (when downloading). This channel is the widest of all three. 
  • Regular telephone service channel – It is used to transmit telephone calls. 

Benefits Of ADSL 

  • It offers greater bandwidth. 
  • The ADSL always stays on and thus saves time in dialing up every time. 
  • ADSL provides 30-40 times faster speed than any dial-up connection. 
  • Neither the voice quality nor the internet speed gets affected when used simultaneously. 
  • It uses the existing infrastructure and thus lowers the installation costs- making it easy to install.
  • The broadband connection is reliable and high-quality. 
  • Data transmission is faster despite a single connection. 
  • Internet access and phone calls are possible at the same time. 
  • The installation and maintenance costs are minimal. 

Limitations Of ADSL 

  • ADSL speed depends on the distance between the ISP and the receiver. The connection may get slower at peak times. 
  • The transmission occurs in copper lines only. If your telecom provider adds any fibre between your location and the ISP, you won’t be able to receive ADSL. 
  • Upload speed is slower. 
  • The ADSL stays sensitive to interference. 
  • It gets affected by the number of users utilizing the same line in an area. 

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