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Termination rates

Termination rates 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 Termination rates rather than just read about it. In short: In telephony, call termination refers to the service provided when a telephone network completes (or "terminates") the connection of a call made by a subscriber using another telephone network with a subscriber using the network which makes the connection complete. In relation to mobile telephone calls, termination can apply to either a call made from a fixed telephone line or a call from another mobile phone networ…

Key takeaways

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

Reference excerpt

In telephony, call termination refers to the service provided when a telephone network completes (or "terminates") the connection of a call made by a subscriber using another telephone network with a subscriber using the network which makes the connection complete. In relation to mobile telephone calls, termination can apply to either a call made from a fixed telephone line or a call from another mobile phone network. The termination rate is the price one telephone network operator charges another for calls that come from the other operator and terminate with a customer on its own network. The termination rate is one of the three components in the cost of providing telephone service, and the one subject to the most variation.

Components On every long-distance call in the United States, the customer pays for:

Origination (dial tone service): connecting the call from the originating customer's equipment to a telephone company central office or exchange). In the era of wired local telephone service (slowly coming to an end with the ubiquity of cell service, starting in the 2010s) this was usually provided by a single company in each locality. The transportation of the signal (the call) to another telephone company office near the recipient of the call. Termination, completing the call from the receiving company central office to the receiving subscriber's equipment. Historically, each of these steps could be carried out via a separate company, and the toll paid by the originating (or in some cases the receiving) caller would be split among the three providers. In the United States, the long-distance connection between the two local telephone company offices was furnished by the Bell System, until that was dismantled in 1984 with the mandated splitting of American Telephone & Telegraph (AT&T) for anti-trust reasons. Since then, especially with the two largest remaining companies – AT&T (the same name, but quite different equipment and service) and Verizon, if the same company provides all three components it keeps the entire charge (toll) paid by the customer. Otherwise, the money received is divided; this is known as intercarrier compensation (ICC) and is intended to keep the telecommunications system functioning, by having every phone company receive compensation for the use of its network. Until 2019 this was the system used for most international phone calls. The originating company in the originating country collects the money (except for collect calls, in which the receiver agrees to pay), keeps some for its expenses, pays some to a company which connects the two countries' networks, and pays another charge, the termination charge, to the company or government agency which connects the incoming international call to the subscriber's equipment in the destination country. While the toll for intra-country (domestic) calls is often controlled by government regulation, there is no world supervision of international call charges. The destination country company or government agency can charge anything the market will bear for its portion of the call — sometimes this varies depending on the part of the receiving country being called — and the originating company must collect and remit this fee to the destination country. As of 2019, there are dramatic differences between countries in the charge demanded by the receiving company for completing (terminating) the call. For example, on one network the 2019 cost of calling from the United States to the Dominican Republic is 6¢ ($0.06) per minute, while a connection to Cuba, a shorter distance, is 92¢ per minute. To some extent this reflects different costs and efficiencies in different countries, but it is used by some countries as a revenue source. In the past, high termination charges in some countries were used as a payment mechanism for phone sex services. In the best-known example, the Guyana Telephone and Telegraph Company was acquired by a U.S. company specifically for this purpose. The Guyanese were (deliberately) unable to access the phone sex lines. With the advent of cellular phone service, the basic structure did not change, but the services use different equipment than that used by the traditional networks, the companies are often different, and everything had to be renegotiated. There are often multiple providers for the originating and the termination portions of the call, since with cellular systems, in which the signal (the call) is transmitted between the customer and the central office via digital radio (before 2008, analog radio) rather than copper wire, the cost of setting up a new or competing service is far lower. In the United States, as of 2011 the termination charge for cellular calls was eliminated by federal regulation, meaning that as perceived by the consumer, there is no difference between the cost of calling a phone on a cell phone network and a phone on the traditional wired network ("land line"). In most other countries this is not the case, and because of the termination charges charged by the mobile networks which complete the calls, which are usually paid by the caller ("calling party pays", although in a few places receiving party pays), the cost of calling a subscriber on a cellular network can be dramatically higher than calling a land line. In some countries the charges vary depending on which of several competing cellular companies completes the call (which company the call recipient subscribes to).

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Termination rates

Start with the simplest possible case. Write down what Termination rates 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 Termination rates 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 Termination rates 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 Termination rates

In research
Termination rates 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 Termination rates 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
Termination rates is common in secondary-school and first-year university syllabi. It links to neighbouring topics Telecommunications economics, so understanding it makes those chapters shorter.
In everyday life
Look for Termination rates 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 Termination rates in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Termination rates 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 Termination rates out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Termination rates in simple terms?

In telephony, call termination refers to the service provided when a telephone network completes (or "terminates") the connection of a call made by a subscriber using another telephone network with a subscriber using the network which makes the connection complete. In relation to mobile telephone c…

Why does Termination rates 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 Termination rates?

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 Termination rates.

Tags

  • Telecommunications economics

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