science

GLUMP

GLUMP 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 GLUMP rather than just read about it. In short: Geographic Number Portability Unbundled Line Metallic Path or GLUMP is a product related to Local Loop Unbundling (LLU) in the Republic of Ireland. Geographic Number Portability (GNP) is the process of a user moving their number to a new address.

Key takeaways

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

Reference excerpt

Geographic Number Portability Unbundled Line Metallic Path or GLUMP is a product related to Local Loop Unbundling (LLU) in the Republic of Ireland. Geographic Number Portability (GNP) is the process of a user moving their number to a new address. Local Loop Unbundling (LLU) is the process of a line being used by a 3rd party to provide a service on the incumbent's exchange or line. Comreg (The Irish Communications Regulator) and eircom, the incumbent telecom company, have named the combination GLUMP. Local Loop Unbundling (LLU) is the better known process of a third party using the "last mile" Copper. GLUMP is a variation on this where a subscriber to a 3rd party for LLU based broadband may keep their existing number or even the analogue phone service from the incumbent. Normally the phone number and analogue line is lost on getting a LLU based product. In the last revision of GLUMP (assisted by Comreg) 2007 only Magnet Networks was availing of this eircom product and by late 2007 even Magnet was making little use as they concentrate on offering their triple-play (Phone, Broadband and TV) via fibre. Number Portability (NP) is defined as a right for the Irish user by Comreg; however, while porting a number between Mobile Phone Operators takes less than an hour, porting an eircom fixed line number can take days to months even if GLUMP is not involved. GLUMP is not required to port an existing number to a non-eircom connection, such as VOIP or phone service provided via fibre, cable or Metro Microwave.

History GLUMP was developed in 2006. The Irish Information Technology news wire reported at the time:

(The) Commission for Communication Regulation (ComReg) ... expressed displeasure at the level of performance and delays in terms of ironing out glitches with some broadband LLU products. ComReg was due to report last week as part of the "roadmap" for LLU, but postponed publication in order to collate data and "provide feedback on key milestones which were due to be completed in early August". One of the milestones set out for the original 8 August deadline was that broadband customers should be able to keep their phone number when changing supplier, and that a long term solution for this issue should be identified. Known in the telecoms sector as number portability, in combination with LLU it is called GLUMP (Geographic Number Portability Unbundled Line Metallic Path). ComReg reports that Eircom launched a trial phase of this service 9 August, and that up to six meetings have been held with industry stakeholders over the past month to tackle automation of number portability.

Investment Investors have been warned about the risks of investing in this, or any other telecommunications securities, under Ireland's Blue Sky Law.

References

Worked examples

Example 1 — a first encounter with GLUMP

Start with the simplest possible case. Write down what GLUMP 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 GLUMP 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 GLUMP 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 GLUMP

In research: GLUMP 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 GLUMP 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: GLUMP is common in secondary-school and first-year university syllabi. It links to neighbouring topics Science and technology in the Republic of Ireland, Telecommunications in the Republic of Ireland, so understanding it makes those chapters shorter.
In everyday life: Look for GLUMP 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 GLUMP in 20 minutes

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

Frequently asked questions

What is GLUMP in simple terms?

Why does GLUMP 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 GLUMP?

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 GLUMP.