ArticleslgStudy

science

Traffic pumping

Traffic pumping 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 Traffic pumping rather than just read about it. In short: Traffic pumping, also known as access stimulation, is a controversial practice by which some local exchange telephone carriers in rural areas of the United States inflate the volume of incoming calls to their networks over what would naturally occur, and profit from the greatly increased intercarrier compensation fees to which they are entitled by the Telecommunications Act of 1996. Definition Under the regulatory m…

Key takeaways

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

Reference excerpt

Traffic pumping, also known as access stimulation, is a controversial practice by which some local exchange telephone carriers in rural areas of the United States inflate the volume of incoming calls to their networks over what would naturally occur, and profit from the greatly increased intercarrier compensation fees to which they are entitled by the Telecommunications Act of 1996.

Definition Under the regulatory mechanisms of the Telecommunications Act of 1996, wireless and long-distance carriers including AT&T, Sprint, T-Mobile US, and Verizon, pay access fees to local exchange carriers (LECs) for calls to those carriers' subscribers. The FCC permits rural carriers to charge substantially higher access fees than carriers in urban areas, based on the rationale that they must pay for substantial fixed infrastructure costs while handling lower call volume. Increasing the incoming call volume to those rural areas, and thereby their earnings from fees, rural carriers partner with certain telephone service providers to route their calls through the rural carrier. These services typically include phone sex and conference call providers, which expect a high volume of incoming calls. Notably these service providers do not need to establish a physical, local presence for routing these calls. As a result of this arrangement, the rural carriers can receive millions of dollars in fees, which they share with the service providers. Payment for inbound long-distance calls to small rural telephone companies is normally handled through a shared pool, the National Exchange Carrier Association ("NECA"). Individual telcos are free to opt out of this process. For two years after opting out, they may bill interexchange carriers directly at a (comparatively high) rate of five to thirteen cents per minute. After two years the carrier must either rejoin the NECA pool, provide evidence to support continuing to charge the high rate, or reduce rates to a level that can be supported. An increase in inbound calling volume at about the same time as a telephone company leaves the NECA pool can therefore represent a profitable two years for that firm. The numbers used for the service belong to a competitive local exchange carrier or independent telephone company and may be located in a rural numbering plan area in a sparsely populated state, such as area code 218 in northern Minnesota or area code 712 in western Iowa.

Voice over IP In 2006, various startup companies began to offer voice over IP or Internet fax services which purported to be "free"; the companies operated from Iowa or used Iowa local numbers. One such service, callchinaforfree.com invited users to call a number in Iowa's area code 641 to reach a voice-over-Internet gateway from which calls could be made to China (country code +86) at no additional cost. Another, talkdigits.com, operated under multiple names (FreeDigits, TalkDigits, OfficeDigits, FaxDigits, ClickDigits, and SIPnumber) to offer a "free US phone number" to receive "free inbound calls" and voicemail or "free fax service" with "unlimited incoming faxes" which would then be delivered outside the region via broadband Internet. By 2007, calls ceased being placed to China for the price of a call to rural Iowa as AT&T disputed millions of dollars' worth of calls. By 2008, the offer of a free Iowa number for inbound Internet voice and fax calls had been withdrawn, and the site talkdigits.com is now defunct and no longer accessible.

Consequences End-users of traffic-pumped phone services often do not pay directly for the high fees collected by rural local carriers and service providers. Many wireless and land line customers now have unlimited long-distance plans, and thus the entire cost of using these services is borne by their long-distance carrier. Providers of traffic-pumped conference calling services assert that these long-distance carriers still profit when their customers use the services. In 2007, AT&T estimated that it would spend an additional $250 million to connect such calls, and has warned that it may have to raise its customers' calling plan prices unless regulators address the issue of traffic pumping. However, providers of traffic-pumped conference calls claim that AT&T has refused to provide evidence of these costs, and that it is a ploy by AT&T to leverage its market power to put competing conference calling providers out of business. AT&T and other long-distance carriers have in some cases attempted to avoid these costs by blocking their customers from calling the phone numbers of traffic-pumping services. However the FCC has forbidden common carriers from using this kind of selective blocking, and so the long-distance carriers are essentially obligated to complete these calls. Based upon an independent study of 50% of long-distance calls originating on wireless networks in the US, calls terminating to local carriers meeting a traffic pumping profile were estimated to cost $95 million annually, representing 11% of all long-distance costs in the study. Extending to all wireless service providers, the cost is estimated to be more than $190 million annually.

Role in dispute between AT&T and Google

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Traffic pumping

Start with the simplest possible case. Write down what Traffic pumping 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 Traffic pumping 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 Traffic pumping 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 Traffic pumping

In research
Traffic pumping 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 Traffic pumping 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
Traffic pumping is common in secondary-school and first-year university syllabi. It links to neighbouring topics Telecommunications economics, United States federal communications legislation, so understanding it makes those chapters shorter.
In everyday life
Look for Traffic pumping 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Traffic pumping in 20 minutes

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

Frequently asked questions

What is Traffic pumping in simple terms?

Traffic pumping, also known as access stimulation, is a controversial practice by which some local exchange telephone carriers in rural areas of the United States inflate the volume of incoming calls to their networks over what would naturally occur, and profit from the greatly increased intercarri…

Why does Traffic pumping 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 Traffic pumping?

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 Traffic pumping.

Tags

  • Telecommunications economics
  • United States federal communications legislation

Keep exploring