Local loop (communication circuit)

Covert, Kathi (2012) Local loop (communication circuit). White Word Publications, Delhi, India. ISBN 978-81-323-4180-2

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Abstract

In telephony, the local loop (also referred to as a subscriber line) is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the carrier or telecommunications service provider's network. At the edge of the carrier access network in a traditional PSTN (public switched telephone network) scenario, the local loop terminates in a circuit switch housed in an ILEC (Incumbent Local Exchange Carrier) CO (Central Office). Traditionally, the local loop was wireline in nature from customer to central office, specifically in the form of an electrical circuit (i.e. loop) provisioned as a single twisted pair in support of voice communications. Where the number of local loops was restricted, different customers could share the same loop, known as a party line. Modern implementations may include a digital loop carrier system segment or fiber optic transmission system known as fiber-in-the-loop. The local loop may terminate at a circuit switch owned by a CLEC (Competitive Local Exchange Carrier) and housed in a point of presence (POP), which typically is either an ILEC CO or a "carrier hotel". A local loop may be provisioned to support data communications applications, or combined voice and data: • analog voice and signaling used in traditional POTS • Integrated Services Digital Network (ISDN) • variants of Digital Subscriber Line (DSL)

Item Type:	Book
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Depositing User:	Practical Student 02
Date Deposited:	08 Nov 2021 08:21
Last Modified:	26 Jul 2022 07:20
URI:	http://odlsystem2.utm.my/id/eprint/2608

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