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Study guide · Last updated November 2026

SCTE BFI Exam Study Guide (2026)

Everything the SCTE Broadband Fiber Installer (BFI) tests, topic by topic: what each section covers, the facts that come up most, and how to study it. Pair it with the free 15-question practice test.

The exam at a glance

Questions50 questions
Time2 hours; the exam cannot be paused and breaks are not allowed
Passing score76% (38 of 50 correct)
FormatOpen book: SCTE training material, books, printed notes, tables, a calculator and internet resources in the same browser are allowed, but AI tools are banned and the session is recorded. SCTE does not describe item types, so practice here uses single-best-answer questions
Certifying bodySCTE, a subsidiary of CableLabs
Test providerOnline through the SCTE portal with Proctorio automated remote proctoring (Chrome or Edge browser, webcam, microphone and a government- or company-issued photo ID)

Mind map: the whole exam on one screen

SCTE BFI
Optical Network Technologies and Components
XGS-PON downstream and upstream wavelengthsPractical loss of a 1:32 splitterCustomer device in an RFoG systemTypical GPON class B+ ONT receive range
Fiber Optic Theory
What keeps light in the coreSingle-mode core diameterTypical single-mode loss at 1550 nmPower at −20 dBm
Fiber Installation
Bend radius for a 6 mm cable under tensionWhere to apply pulling force on a dropEndface angle of an APC connectorTypical fusion splice loss
Troubleshooting and Maintenance
7 key facts
Standards
6 key facts
Safety
6 key facts
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Read the complete SCTE BFI study notes for “Optical Network Technologies and Components”

Our first full set of comprehensive notes, about 15 minutes of reading: PON building blocks · PON systems and wavelengths · RF over Glass (RFoG) · Power budgets, a worked exam example, the traps examiners use and a one-minute recap. Create a free account to read it and see how premium notes work before you decide.

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1. Optical Network Technologies and Components

SCTE BFI topic area 1: FTTH architectures (EPON, GPON, XGS-PON, RFoG), OLTs, splitters, terminals, ONTs and R-ONUs. SCTE lists this area on its exam page but does not publish its share of questions.

Key facts

  • A PON has an OLT at the hub or headend, passive splitters in the field and an ONT at each home.
  • GPON (ITU-T G.984): 1490 nm down, 1310 nm up, 1550 nm optional RF video. EPON (IEEE 802.3ah) also uses 1490/1310 nm.
  • XGS-PON (ITU-T G.9807.1) and 10G-EPON use 1577 nm down and 1270 nm up, so they can share fiber and splitters with GPON.
  • RFoG (ANSI/SCTE 174) keeps DOCSIS: an R-ONU converts 1550 nm downstream to RF and returns upstream RF as light, commonly 1610 nm.
  • Splitter loss: about 3.5 dB per 1:2 stage in practice, about 10.5 dB for 1:8 and 17 to 18 dB for 1:32.
  • A PON budget: OLT launch power minus fiber, splitter, splice and connector loss must stay within the ONT's receive range.
  • Fiber distribution hubs house splitters; multiport service terminals (MSTs) give hardened connector ports for drops.

Flashcards

XGS-PON downstream and upstream wavelengths1577 nm down, 1270 nm up.
Practical loss of a 1:32 splitterAbout 17 to 18 dB.
Customer device in an RFoG systemThe R-ONU.
Typical GPON class B+ ONT receive rangeAbout −8 to −27 dBm.

Exam tip: Draw the PON from OLT to ONT with each loss written on the line. Budget questions become simple subtraction.

2. Fiber Optic Theory

SCTE BFI topic area 2: how light travels in fiber, single-mode versus multimode, wavelengths, attenuation, dispersion and dB/dBm arithmetic. Question share not published.

Key facts

  • Light is guided by total internal reflection because the core's refractive index is higher than the cladding's.
  • Single-mode: about 9 µm core, 125 µm cladding, one mode, used at 1310 and 1550 nm. Multimode: 50 or 62.5 µm core, used at 850 and 1300 nm.
  • Typical single-mode attenuation: about 0.35 dB/km at 1310 nm and 0.25 dB/km at 1550 nm.
  • Attenuation comes from absorption and scattering; bending loss grows at longer wavelengths.
  • dBm is power relative to 1 mW: 0 dBm = 1 mW, −10 dBm = 100 µW, −20 dBm = 10 µW, −30 dBm = 1 µW.
  • Every 3 dB of loss halves the power; every 10 dB divides it by 10.
  • Chromatic dispersion matters on long, high-speed links; modal dispersion limits multimode.

Flashcards

What keeps light in the coreTotal internal reflection: core index higher than cladding.
Single-mode core diameterAbout 9 µm (cladding 125 µm).
Typical single-mode loss at 1550 nmAbout 0.25 dB/km.
Power at −20 dBm10 µW.

Exam tip: Convert dBm only when asked; otherwise add and subtract dB directly. It is faster and safer on an open-book clock.

3. Fiber Installation

SCTE BFI topic area 3: aerial and underground drops, cable handling, bend radius and pulling tension, connectors, splicing and terminating at the MST and ONT. Question share not published.

Key facts

  • Common bend radius rule: 20 times cable diameter under tension, 10 times at rest, unless the manufacturer says otherwise.
  • Pull on strength members through a grip and swivel, never on fibers, jackets or connectors; stay under the rated tension.
  • Fusion splices typically lose under 0.1 dB; mechanical splices about 0.3 dB or more.
  • APC connectors are green with an 8 degree angled endface; UPC are blue. Never mate APC to UPC.
  • Use hardened, pre-connectorized drops where the network is designed for them; cap every unused port.
  • Protect splices in sleeves and trays, and coil slack loops without violating bend radius.
  • Call 811 before burying drops and respect locate marks.

Flashcards

Bend radius for a 6 mm cable under tension120 mm (20 × diameter).
Where to apply pulling force on a dropThe strength members, through a pulling grip.
Endface angle of an APC connector8 degrees.
Typical fusion splice lossUnder 0.1 dB.

Exam tip: Installation questions reward the habit of protecting the glass: bend radius, pulling on strength members and clean connectors.

Test yourself on these topics

Take the free 15-question SCTE BFI test, then save your results to unlock your Readiness Score and the mistakes bank.

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4. Troubleshooting and Maintenance

SCTE BFI topic area 4: power meters, visual fault locators, OTDRs, inspection and cleaning, and isolating faults in residential fiber service. Question share not published.

Key facts

  • Inspect before you connect: check every endface with a fiber microscope, clean if needed, then re-inspect.
  • Clean dry first; use a wet-to-dry method for stubborn contamination.
5 more key facts, 10 key notes, 135 flashcards and 500 practice questions for this topic are in premium.

Flashcards

First action on low ONT powerInspect and clean the connectors.

Exam tip: Match the symptom to the cheapest check first: inspect and clean, then meter, then VFL, then OTDR.

5. Standards

SCTE BFI topic area 5: the ITU-T, IEEE, SCTE, TIA and IEC documents that define fibers, PON systems, color codes and inspection criteria. Question share not published.

Key facts

  • ITU-T G.652: standard single-mode fiber; G.657: bend-insensitive single-mode (A1, A2 compatible with G.652; B3 for very tight bends).
  • ITU-T G.984 defines GPON; G.9807.1 defines XGS-PON.
4 more key facts, 10 key notes, 130 flashcards and 500 practice questions for this topic are in premium.

Flashcards

ITU-T bend-insensitive fiber recommendationG.657.

Exam tip: Learn standards as pairs of number and purpose; questions ask which document covers a job, not what its text says.

6. Safety

SCTE BFI topic area 6: laser and light safety, glass shards, chemicals, and field hazards when installing fiber drops. Question share not published.

Key facts

  • Never look into a fiber or connector; PON and OTDR light is infrared and invisible.
  • Check a fiber with a power meter, not your eye, and view endfaces only through a scope with the source off or filtered.
4 more key facts, 10 key notes, 130 flashcards and 500 practice questions for this topic are in premium.

Flashcards

Why you cannot see PON laser lightIt is infrared (1310 to 1577 nm).

Exam tip: Safety questions are easy marks if you always pick the answer that keeps glass and laser light away from eyes and skin.

How to pass

  • SCTE lists six topic areas: optical network technologies and components, fiber optic theory, fiber installation, troubleshooting and maintenance, standards and safety. Give every one study time, because the public page doesn't show how many questions each carries.
  • Power budgets are open-book arithmetic: launch power minus fiber, splitter, splice and connector losses. Know typical splitter losses (about 3.5 dB per 1:2 stage, 17 to 18 dB for 1:32) so you can check your answer is sensible.
  • SCTE's BFI curriculum includes separate courses on EPON, GPON and RF over Glass. Learn each one's wavelengths and what sits at the home end (ONT or R-ONU).
  • Inspect before you connect: dirty connectors cause most low-power faults in FTTH. Expect questions on endface inspection, cleaning order and APC versus UPC.

Frequently asked questions

How long should I study for the SCTE BFI exam?

Most working candidates need 4 to 8 weeks at 45 to 60 minutes a day. Book your exam once your Readiness Score has stayed at 80 or higher for about a week.

Can I take the SCTE BFI exam online?

BICSI's v15 handbook describes the RCDD exam at Pearson VUE test centers, not remote proctoring. Format: open book: scte training material, books, printed notes, tables, a calculator and internet resources in the same browser are allowed, but ai tools are banned and the session is recorded. scte does not describe item types, so practice here uses single-best-answer questions. Check pearsonvue.com/bicsi for the options in your country.

What score do I need to pass the SCTE BFI exam?

76% (38 of 50 correct). The exam has 50 questions and a time limit of 2 hours; the exam cannot be paused and breaks are not allowed.

What are the most tested topics?

The outline covers optical network technologies and components, fiber optic theory, fiber installation, troubleshooting and maintenance, standards, safety. Use the free practice test to see which ones you need most.

The premium SCTE BFI study path

Premium SCTE BFI prep is studied one topic at a time. Each step starts with that topic's key notes and flashcard deck, then its own question sets of 25, so you master one topic before you move to the next. When every topic is strong, the 6 full mock exams show you're ready.

3,000practice questions, every answer explained
6full-length mock exams, 50 questions each, timed
800flashcards with spaced repetition, sorted by topic
60comprehensive key notes across 6 topics

Your step-by-step study path

  1. 1
    Optical Network Technologies and Components10 key notes, 135 flashcards, then 500 practice questions in 20 sets of 25
    Notes free with an account
  2. 2
    Fiber Optic Theory10 key notes, 135 flashcards, then 500 practice questions in 20 sets of 25
    Premium
  3. 3
    Fiber Installation10 key notes, 135 flashcards, then 500 practice questions in 20 sets of 25
    Premium
  4. 4
    Troubleshooting and Maintenance10 key notes, 135 flashcards, then 500 practice questions in 20 sets of 25
    Premium
  5. 5
    Standards10 key notes, 130 flashcards, then 500 practice questions in 20 sets of 25
    Premium
  6. 6
    Safety10 key notes, 130 flashcards, then 500 practice questions in 20 sets of 25
    Premium
  7. Final step: 6 full mock exams50 questions each, timed like test day. Pass them, then book your exam.
    Premium

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Summarized from BICSI's official candidate information and the rules cited, checked October 2026. Confirm current requirements with SCTE, a subsidiary of CableLabs.

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