astronomy

Nortel Norstar

Nortel Norstar is a astronomy 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 Nortel Norstar rather than just read about it. In short: The Nortel Norstar, previously the Meridian Norstar, was a small and medium-sized business digital key telephone system introduced by Nortel (formerly Northern Telecom) and later sold to Avaya. It featured automatic call distribution, and supported up to 192 extensions.

Key takeaways

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

Reference excerpt

The Nortel Norstar, previously the Meridian Norstar, was a small and medium-sized business digital key telephone system introduced by Nortel (formerly Northern Telecom) and later sold to Avaya. It featured automatic call distribution, and supported up to 192 extensions. In the United Kingdom it was sold by British Telecom, rebadged as the BT Norstar.

History With the advent of LSI ICs, also called integrated circuits in the 1980s, key telephone system design went from electro-mechanical parts to electronic or fully digital parts. The first key system developed by Northern Telecom in the early 1980s was the Vantage TDD system. Unlike the success of the SL1 system, the Vantage system did not catch with the business environment and the Meridian Norstar was developed as its replacement. In 1988, Nortel developed the Meridian Norstar system. This system directly competed with the AT&T Merlin, ROLM Redwood, Executone/Isotec Hybrid systems, Toshiba DK Strata, and NEC hybrid systems. Unlike the earlier Vantage system, the Norstar went on to be one of the leading telephone systems in the world. It is visible worldwide with installations at major retail chains, educational environments, medical institutions, government facilities, and many places where key telephone systems are required. The Norstar system went further than the other systems in similarity to a PBX system such as the Meridian SL-1/Meridian 1 system developed in the late 1980s as well. This allowed blurring the distinction of key telephone system versus PBX telephone system. Many features such as Direct Inward Dial, Caller ID, Automatic Call Distribution, and Call Accounting were designed off the larger Meridian 1 PBX, DMS-100 and Meridian SL-100 as opposed to being developed as an independent system. Although there were many hardware/design similarities between the Norstar systems and larger Meridian 1/Meridian SL-100 systems, the telephones themselves could not be used interchangeably between the key system and PBX. They were, however, backward compatible on their respective switch. That is, the oldest Meridian M7000 telephones can be used on the newest Business Communication Manager system. The latest T7000 series telephones can also be used on an older Norstar system such as the DR5.1. This allows companies to invest in hardware as needed.

Migration path The Norstar system is no longer produced by Nortel and branded as the Nortel Norstar system. The recommended migration path from the Norstar to a full VOIP/SIP system is the Avaya IP Office, although it was previously the Nortel BCM (for Business Communication Manager). There were two systems available, the BCM50 for smaller enterprises with 3-30 extensions and the BCM450 which allows up to 300 sets. The BCM200, BCM400, and BCM1000 were older releases of this same platform. After Avaya's acquisition of Nortel's Enterprise Division, it announced that the Norstar and BCM systems would continue being manufactured, but under the Avaya name. Avaya rolled out cards that supported the Nortel sets on the IP Office platform. Nortel features and programming would be preserved, but would accompany Avaya features and programming as well.

See also Business telephone system Telephone hook

References

External links Media related to Nortel telephones at Wikimedia Commons

Illustrations

Norstar logo

Worked examples

Example 1 — a first encounter with Nortel Norstar

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

In research: Nortel Norstar appears in astronomy 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 Nortel Norstar 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: Nortel Norstar is common in secondary-school and first-year university syllabi. It links to neighbouring topics Avaya, Nortel products, Telephone exchanges, so understanding it makes those chapters shorter.
In everyday life: Look for Nortel Norstar 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 Nortel Norstar in 20 minutes

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

Frequently asked questions

What is Nortel Norstar in simple terms?

Why does Nortel Norstar matter?

Because it connects several astronomy 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 Nortel Norstar?

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 Nortel Norstar.