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What is the full form of ADSL?

Full form of ADSL: Here, we are going to learn what does ADSL stands for? ADSL – which is an abbreviation of "Asymmetric Digital Subscriber Line" in Computer Acronyms/Abbreviations, etc.
Submitted by Anushree Goswami, on March 19, 2020

ADSL: Asymmetric Digital Subscriber Line

ADSL is an abbreviation of "Asymmetric Digital Subscriber Line".

It is a one of the category of digital subscriber line (DSL) technology, a data communications technology that allows more rapidly data transmission over copper telephone lines in comparison to a conventional voice band modem can make available. ADSL varies from the less widespread symmetric digital subscriber line (SDSL).

In ADSL, bandwidth and bit rate are supposed to be asymmetric, which signifies larger on the way to the customer premises (downstream) than the reverse (upstream). Service providers generally promote ADSL as a service for consumers for Internet access for first and foremost downloading content from the Internet, other than not serving content accessed by others.

Transport Protocols

ADSL classifies three "Transmission protocol-specific transmission convergence (TPS-TC)" layers, which comprise:

  • Synchronous Transport Module (STM), which enables the transmission of frames of the Synchronous Digital Hierarchy (SDH)
  • Asynchronous Transfer Mode (ATM)
  • Packet Transfer Mode

ADSL Standards

Version Standard name Common name Downstream rate Upstream rate Approved in
ADSL ANSI T1.413-1998 Issue 2 ADSL 8.0 Mbit/s 1.0 Mbit/s 1998
ADSL ITU G.992.2 ADSL Lite (G.lite) 1.5 Mbit/s 0.5 Mbit/s 1999-07
ADSL ITU G.992.1 ADSL (G.dmt) 8.0 Mbit/s 1.3 Mbit/s 1999-07
ADSL ITU G.992.1 Annex A ADSL over POTS 12.0 Mbit/s 1.3 Mbit/s 2001
ADSL2 ITU G.992.3 Annex L RE-ADSL2 5.0 Mbit/s 0.8 Mbit/s 2002-07
ADSL2ITU G.992.3ADSL212.0 Mbit/s1.3 Mbit/s2002-07
ADSL2ITU G.992.3 Annex JADSL212.0 Mbit/s3.5 Mbit/s2002-07
ADSL2ITU G.992.4Splitterless ADSL21.5 Mbit/s0.5 Mbit/s2002-07
ADSL2+ITU G.992.5ADSL2+24.0 Mbit/s1.4 Mbit/s2003-05
ADSL2+ITU G.992.5 Annex MADSL2+M24.0 Mbit/s3.3 Mbit/s2008

Download Speed (ADSL 2+)

Distance(from DSLAM)Download Speed (Megabytes per second)Download Speed (Megabits per second)Download Time Example (9.3MB MP3 file)
0.3 km (approx 0.19 miles)3.0 MB/sec24.0 Mbit/s3.0 seconds
0.6 km (approx 0.37 miles)3.0 MB/sec24.0 Mbit/s3.0 seconds
0.9 km (approx 0.56 miles)2.88 MB/sec23.0 Mbit/s3.2 seconds
1.2 km (approx 0.75 miles)2.75 MB/sec22.0 Mbit/s3.4 seconds
1.5 km (approx 0.93 miles)2.63 MB/sec21.0 Mbit/s3.5 seconds
1.8 km (approx 1.12 miles)2.38 MB/sec19.0 Mbit/s3.9 seconds
2.1 km (approx 1.3 miles)2.0 MB/sec16.0 Mbit/s4.7 seconds
3.0 km (approx 1.86 miles)1.0 MB/sec8.0 Mbit/s9.3 seconds
4.5 km (approx 2.80 miles)0.38 MB/sec (384 KB/sec)3.0 Mbit/s24.5 seconds
5.2 km (approx 3.23 miles)0.19 MB/sec (192 KB/sec)1.5 Mbit/s49 seconds

Reference: Asymmetric digital subscriber line






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