computer science

Yahoo Voice

Yahoo Voice is a computer 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 Yahoo Voice rather than just read about it. In short: Yahoo Voice was a Voice over Internet Protocol (VoIP), PC-PC, PC-Phone and Phone-to-PC telecommunications service. It was provided by Yahoo via its Yahoo Messenger instant messaging application.

Key takeaways

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

Reference excerpt

Yahoo Voice was a Voice over Internet Protocol (VoIP), PC-PC, PC-Phone and Phone-to-PC telecommunications service. It was provided by Yahoo via its Yahoo Messenger instant messaging application. Yahoo Voice used the Session Initiation Protocol (SIP), GIPS codec and the Dialpad engine for voice transport. After 2008 the service was provided by JAJAH, an external VoIP provider. In July 2012, Yahoo Voice was compromised and 453,491 email addresses and passwords were stolen using SQL injection. A 17 MB text file containing the stolen passwords was released by a group of hackers called D33DS company. Yahoo announced the end of Yahoo Voice on January 30, 2013.

Yahoo Phone Out PC-to-Phone calls to landlines and mobile phones was provided via the Yahoo Phone Out service. Conference calls from PC to Multiple (PSTN) phones or mobiles was not supported.

Yahoo Phone In Phone-to-PC calls can be received from landline or mobile phones. With Yahoo Phone In users could choose a phone number from three countries (US, UK and France).

Unsupported functionality Voice call encryption PC-Phone (Multiple) Conference calls

See also Yahoo Messenger VoIP Comparison of VoIP software

References

External links Yahoo Voice

Worked examples

Example 1 — a first encounter with Yahoo Voice

Start with the simplest possible case. Write down what Yahoo Voice claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer 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 Yahoo Voice 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 Yahoo Voice 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 Yahoo Voice

In research: Yahoo Voice appears in computer 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 Yahoo Voice 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: Yahoo Voice is common in secondary-school and first-year university syllabi. It links to neighbouring topics Discontinued Yahoo! services, Teleconferencing, VoIP services, so understanding it makes those chapters shorter.
In everyday life: Look for Yahoo Voice 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 Yahoo Voice in 20 minutes

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

Frequently asked questions

What is Yahoo Voice in simple terms?

Yahoo Voice was a Voice over Internet Protocol (VoIP), PC-PC, PC-Phone and Phone-to-PC telecommunications service. It was provided by Yahoo via its Yahoo Messenger instant messaging application.

Why does Yahoo Voice matter?

Because it connects several computer 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 Yahoo Voice?

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 Yahoo Voice.