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Local-loop unbundling

Local-loop unbundling is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Local-loop unbundling rather than just read about it. In short: Local loop unbundling (LLU or LLUB) is the regulatory process of allowing multiple telecommunications operators to use connections from a telephone exchange to the customer's location. The physical wire connection between the local exchange and the customer is known as a "local loop" and is owned by the incumbent local exchange carrier (also referred to as the "ILEC", "local exchange", or in the United States, eithe…

Key takeaways

  • Local-loop unbundling belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Local-loop unbundling to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Local-loop unbundling from memory before moving on to harder problems.

Reference excerpt

Local loop unbundling (LLU or LLUB) is the regulatory process of allowing multiple telecommunications operators to use connections from a telephone exchange to the customer's location. The physical wire connection between the local exchange and the customer is known as a "local loop" and is owned by the incumbent local exchange carrier (also referred to as the "ILEC", "local exchange", or in the United States, either a "Baby Bell" or an independent telephone company). To increase competition, other providers are granted unbundled access.

Policy background

LLU is generally opposed by ILECs, which are generally either former investor-owned (North America) or state-owned monopoly enterprises. ILECs argue that LLU amounts to regulatory taking, which causes them to be compelled to provide competitors with business inputs, so they believe that LLU stifles infrastructure-based competition and technical innovation because new entrants prefer to use the incumbent's network instead of building their own and that the regulatory interference required to make LLU work (e.g., to set the LLU access price) is detrimental to the market. New entrants, on the other hand, argue that since they cannot economically duplicate the incumbent's local loop, they cannot provide certain services, such as ADSL, thus allowing the incumbent to monopolise the respective potentially competitive market(s) and prevent innovation. They argue that alternative access technologies, such as wireless local loop, have been proven uncompetitive or impractical, and that under current pricing models, the incumbent is in many cases, depending on the regulatory model, guaranteed a fair price for the use of its facilities, including an appropriate return on investment. Finally, they argue that the ILECs generally did not construct their local loop in a competitive market environment, but under legal monopoly protection and using taxpayer's money, meaning that, according to the new entrants, that ILECs should not to be entitled to continue to extract regulated rates of return, which often include monopoly rents from the local loop. Most industrially developed nations, including the US, Australia, the European Union member states, and India, have introduced regulatory frameworks that provide for LLU. Regulators are tasked with regulating a changing market without preventing innovation and without improperly disadvantaging competitors. The first action in the EU resulted from a report written for the European Commission in 1993. It took several years for the EU legislation to require unbundling and in individual countries in the EU, the process took further time to mature to become practical and economic rather than being a legal possibility. The 1993 report referred to the requirement to unbundle optical fibre access and recommended deferral to a later date when fibre access would be more common. In 2006, there were signs that, as a result of the municipal fibre networks movement in countries such as Sweden, where unbundled local loop fibre is commercially available from both the incumbent and competitors, there was a potential for policy evolving in a different direction. In 1996, Section 251 of the United States Telecommunication Act defined unbundled access as:

The duty to provide, to any requesting telecommunications carrier for the provision of a telecommunications service, nondiscriminatory access to network elements on an unbundled basis at any technically feasible point on rates, terms, and conditions that are just, reasonable, and nondiscriminatory in accordance with the terms and conditions of the agreement and the requirements of this section and section 252. An incumbent local exchange carrier shall provide such unbundled network elements in a manner that allows requesting carriers to combine such elements in order to provide such telecommunications service.

Unbundling developments around the world

World Trade Organisation Some provisions of World Trade Organization (WTO) telecommunications law can be read to require unbundling:

Section 5(a) of the GATS Annex on Telecommunications requires WTO Members to guarantee service suppliers "access to and use of public telecommunications transport networks [...] for the supply of a service". New entrants have argued that without LLU, they cannot supply services such as ADSL. Section 2.2(b) of the 1998 Reference Paper, to which some Members have subscribed, requires "sufficiently unbundled interconnection" with major providers. However, the Paper's definition of interconnection appears to exclude LLU. Section 1 of the paper requires members to maintain "appropriate measures [...] for the purpose of preventing [major] suppliers [...] from engaging in or continuing anti-competitive practices." New entrants argue that such practices include not giving competitors access to facilities necessary for market entry, such as the local loop. The question has not been settled before a WTO judicial body, and it is thought that these obligations may only apply where the respective WTO member has committed itself to open its basic telecommunications market to competition. About 80 mostly-developed members have done so since 1998.

India

LLU has not been implemented in Indian cities yet. However, BSNL recently stated that it would open up its copper loops for private participation. The proliferation of WiMax and cable broadband has increased broadband penetration and market competition. By 2008, a price war had reduced basic broadband prices to INR 250 (US$6), including line rental without any long-term contracts. In rural areas, the state player, BSNL, is still the leading, and often the only supplier. Although BSNL is a monopoly, it is used by the government to create competition.

European Union

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Local-loop unbundling

Start with the simplest possible case. Write down what Local-loop unbundling claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Local-loop unbundling before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Local-loop unbundling ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Local-loop unbundling

In research
Local-loop unbundling appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Local-loop unbundling in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Local-loop unbundling is common in secondary-school and first-year university syllabi. It links to neighbouring topics Broadband, Local loop, Telecommunications economics, so understanding it makes those chapters shorter.
In everyday life
Look for Local-loop unbundling outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Local-loop unbundling in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Local-loop unbundling means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Local-loop unbundling out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Local-loop unbundling in simple terms?

Local loop unbundling (LLU or LLUB) is the regulatory process of allowing multiple telecommunications operators to use connections from a telephone exchange to the customer's location. The physical wire connection between the local exchange and the customer is known as a "local loop" and is owned b…

Why does Local-loop unbundling matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Local-loop unbundling?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Local-loop unbundling.

Tags

  • Broadband
  • Local loop
  • Telecommunications economics

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