Editing Leased line (section)

==Availability==

===In the United Kingdom===
In the [[telecommunications in the United Kingdom|UK]], leased lines are available at speeds from 64&nbsp;kbit/s increasing in 64&nbsp;kbit/s increments to 2.048&nbsp;Mbit/s over a channelised [[E-carrier|E1]] tail circuit and at speeds between 2.048&nbsp;Mbit/s to 34.368&nbsp;Mbit/s via channelised [[E-carrier|E3]] tail circuits. The [[network termination|NTE]] will terminate the circuit and provide the requested presentation most frequently [[X.21]] however higher speed interfaces are available such as [[G.703]] or [[10BASE-T]]. Some ISPs however use the term more loosely, defining a leased line as “any dedicated bandwidth service delivered over a leased fibre connection".

As of March 2018, Leased Line services are most commonly available in the region of 100&nbsp;Mbit/s to 1&nbsp;Gbit/s. In large cities, for example, London, speeds of 10&nbsp;Gbit/s are attainable.

===In the United States===
In the [[Communications in the United States|U.S.]], low-speed leased lines (56&nbsp;kbit/s and below) are usually provided using analog modems. Higher-speed leased lines are usually presented using '''FT1''' ('''Fractional T1'''): a '''[[Digital Signal 1|T1]]''' bearer circuit with 1 to 24, 56k or 64k [[Time-division multiple access|timeslots]]. Customers typically manage their own network termination equipment, which include a Channel Service Unit and Data Service Unit ([[CSU/DSU]]).

===In Hong Kong===
In [[communications in Hong Kong|Hong Kong]], leased lines are usually available at speeds of 64k, 128k, 256k, 512k, T1 ([[channelization (telecommunications)|channelized]] or not) or [[E-carrier#E1|E1]] (less common). Whatever the speed, telcos usually provide the CSU/DSU and present to the customer on [[V.35 (recommendation)|V.35]] interface.

Fibre circuits are slowly replacing the traditional circuits and are available at nearly any bandwidth.

===In India===
In [[Communications in India|India]], leased lines are available at speeds of 64&nbsp;kbit/s, 128&nbsp;kbit/s, 256&nbsp;kbit/s, 512&nbsp;kbit/s, 1&nbsp;Mbit/s, 2&nbsp;Mbit/s, 4&nbsp;Mbit/s, 8&nbsp;Mbit/s, 1000&nbsp;Mbit/s T1(1.544&nbsp;Mbit/s) or E1(2.048&nbsp;Mbit/s) and up to 622&nbsp;Mbit/s. Customers are connected either through [[Fiber-optic cable|OFC]], [[telephone lines]], [[ADSL]], or through [[Wi-Fi]]. Customers would have to manage their own network termination equipment, namely the [[channel service unit]] and [[data service unit]].

===In Italy===
In [[Communications in Italy|Italy]], leased lines are available at speeds of 64&nbsp;kbit/s (terminated by DCE2 or DCE2plus modem) or multiple of 64&nbsp;kbit/s from 128&nbsp;kbit/s up to framed or unframed E1 (DCE3 modem) in digital form (PDH service, known as CDN, ''Circuito Diretto Numerico''). Local [[telephone company|telephone companies]] also may provide CDA (''Circuito Diretto Analogico''), that are plain copper [[dry pair]] between two buildings, without any line termination: in the past (pre-2002) a full analog base band was provided, giving an option to customer to deploy xDSL technology between sites: nowadays everything is limited at 4&nbsp;kHz of bearer channel, so the service is just a [[plain old telephone service|POTS]] connection without any setup channel.

For many purposes, leased lines are gradually being replaced by [[DSL]] and [[metro Ethernet]].