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Gandalf Technologies

Gandalf Technologies 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 Gandalf Technologies rather than just read about it. In short: Gandalf Technologies, Inc. was a Canadian data communications company based in Ottawa. It was best known for modems and terminal adapters that allowed computer terminals to connect to host computers through a single interface.

Gandalf Technologies — main illustration
Gandalf Technologies — illustration

Key takeaways

  • Gandalf Technologies 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 Gandalf Technologies to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Gandalf Technologies from memory before moving on to harder problems.

Reference excerpt

Gandalf Technologies, Inc. was a Canadian data communications company based in Ottawa. It was best known for modems and terminal adapters that allowed computer terminals to connect to host computers through a single interface. Gandalf also pioneered a radio-based mobile data terminal that was popular for many years in taxi dispatch systems. The rapid rise of TCP/IP relegated many of Gandalf's products to niche status, and the company went bankrupt in 1997; its assets were acquired by Mitel.

History Gandalf was founded by Desmond Cunningham and Colin Patterson in 1971, and started business from the lobby of the Skyline Hotel, which is now the Crowne Plaza Hotel, on Albert Street in Ottawa. The company's first products were industrial-looking half-bridges for remote terminals which were supported by large terminal multiplexers on the "computer end". Gandalf referred to these systems as a "PACX", in analogy to the telephony PABX which provided similar services in the voice field. These systems allowed the user to "dial up" the Gandalf box and then instruct it what computer they wanted to connect to. In this fashion, large computer networks could be built in a single location using shared resources, as opposed to having to dedicate terminals to different machines. These systems were particularly popular in large companies and universities. Gandalf supplanted these systems with "true" modems, both for host-to-host use and for remote workers. Unlike most modems, Gandalf's devices were custom systems intended to connect only to another Gandalf modem, and were designed to extract the maximum performance possible. Gandalf sold a number of different designs intended to be used with different line lengths and qualities, from 4-wire modems running at 9600 bit/s over "short" distances (bumped to 19,200 bit/s in later models), to 2400 bit/s models for 2-wire runs over longer distances. On the host-end, modem blocks could be attached to the same PACX multiplexers, making local and remote access largely identical. With the introduction of low-cost high-speed modems in the early 1990s, Gandalf increasingly became irrelevant. Even highest-speed solutions were soon being outperformed by standardized systems like v.32bis. Low-cost terminal adapters based on RADIUS (and similar) technologies connecting to Ethernet further eroded its core businesses, offering features similar to PACX switches. Gandalf's solutions were decidedly "low tech"; users selected what computer they wanted to connect to by selecting a two-digit number on the front of the modem, often requiring a "phone book" if more than one host computer was being used. In comparison, the more modern terminal adapters generally included a command line interface that allowed the user to select a host from a directory that appeared on their terminal. Introductions of Ethernet concentrators and ISDN-based versions of earlier host adapters did little to fix the problem, never becoming very popular in comparison to the standardized solutions from other vendors. Gandalf Technologies filed for bankruptcy in 1997. Mitel purchased all of the product business of Gandalf, including intellectual properties, the goodwill of the business including the exclusive right to use the name worldwide for $14.9 million. Mitel used the data technology and personnel to help move its PBX division into the VoIP market. Mitel tried to keep some Gandalf data products in the market for a short time, but poor sales led to them being abandoned.

References

External links Official website at the Wayback Machine (archived 1998-01-21)

Illustrations

Gandalf Technologies illustration
Gandalf Technologies: A Gandalf terminal host selector, or "Gandalf box", was a common feature in many university and company computer centers into the 1990s. It communicated with a Gandalf PACX crossbar in the machine room.
A Gandalf terminal host selector, or "Gandalf box", was a common feature in many university and company computer centers into the 1990s. It communicated with a Gandalf PACX crossbar in the machine room.

Worked examples

Example 1 — a first encounter with Gandalf Technologies

Start with the simplest possible case. Write down what Gandalf Technologies 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 Gandalf Technologies 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 Gandalf Technologies 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 Gandalf Technologies

In research
Gandalf Technologies 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 Gandalf Technologies 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
Gandalf Technologies is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1971 establishments in Ontario, Canadian companies disestablished in 1997, Canadian companies established in 1971, so understanding it makes those chapters shorter.
In everyday life
Look for Gandalf Technologies 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 Gandalf Technologies in 20 minutes

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

Frequently asked questions

What is Gandalf Technologies in simple terms?

Gandalf Technologies, Inc. was a Canadian data communications company based in Ottawa. It was best known for modems and terminal adapters that allowed computer terminals to connect to host computers through a single interface.

Why does Gandalf Technologies 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 Gandalf Technologies?

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 Gandalf Technologies.

Tags

  • 1971 establishments in Ontario
  • Canadian companies disestablished in 1997
  • Canadian companies established in 1971
  • Companies based in Ottawa
  • Companies that have filed for bankruptcy in Canada
  • Defunct companies of Ontario
  • Defunct computer companies of Canada
  • Defunct computer hardware companies
  • Defunct networking companies
  • Defunct technology companies of Canada
  • Defunct telecommunications companies of Canada
  • Technology companies disestablished in 1997

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