A practical buyer-side checklist for document approval, inspection and test plans, material traceability, optical and mechanical testing, calibration review, nonconformity control, drum inspection, release authorization, packing, and shipment.
Published 2026-06-21 · MapleArashi Technical Insights
A factory acceptance test is not simply a visit to the production facility and it is not a repetition of every qualification test ever performed on the cable design. It is a contract-controlled process used to confirm that the manufactured goods, inspection records, test results, markings, drum quantities, documents, and packing satisfy the approved purchase specification before shipment.
The buyer, its consultant, or an appointed inspection company normally reviews the approved technical documents, witnesses selected tests, verifies production traceability, checks the finished drums, records any nonconformities, and confirms whether the goods may be released. The FAT scope should be agreed before production starts. It should not be improvised after the cable has already been manufactured.
| Test or Inspection Category | Primary Purpose | Typical Application |
|---|---|---|
| Type test | Demonstrate that a cable design or qualified product family can satisfy defined mechanical, environmental, optical, or material requirements | Performed on representative samples according to the applicable qualification plan |
| Routine test | Confirm production output and drum-specific properties | Length, continuity, attenuation, dimensions, marking, and visual inspection as contractually required |
| Factory acceptance test | Allow the buyer to review documents, witness agreed tests, inspect finished goods, resolve findings, and approve release | Performed before packing completion or shipment, according to the approved ITP |
| Incoming inspection | Check identity, transport condition, quantity, visible damage, and selected optical properties after delivery | Warehouse or project destination |
| Site acceptance test | Verify installed cable or completed optical links | Continuity, end-to-end loss, OTDR, splicing, and route-specific acceptance after installation |
The technical specification should define which tests are qualification evidence, which are repeated during production, which are witnessed during FAT, and which occur after delivery. Otherwise the buyer and manufacturer may interpret the same test schedule differently.
Inspection must be performed against an approved baseline. The inspector should not be asked to decide technical requirements from emails, preliminary quotations, or an unapproved catalogue sheet.
Any change in fiber source, sheath compound, armor, strength member, water-blocking system, cable diameter, marking, or test method should be traceable to a formally approved revision or deviation.
For the earlier specification stage, see Fiber Optic Cable Technical Specification Checklist for Telecom Procurement .
The ITP should convert the contract into a sequence of verifiable manufacturing, inspection, testing, review, and release activities. Each row should identify the applicable document, acceptance criterion, responsible party, inspection level, required record, and buyer involvement.
| Control Point | Meaning | Recommended Use |
|---|---|---|
| Hold point | Work must not proceed until the nominated party provides formal authorization | Use only for critical stages where proceeding would prevent later verification or create major contractual risk |
| Witness point | The buyer is invited to attend; the procedure should define what happens if the buyer does not attend after proper notice | Selected optical, mechanical, dimensional, packing, or release inspections |
| Review point | Records or documents are submitted for examination | Material certificates, calibration records, type-test reports, and routine-test results |
| Surveillance point | The inspector may observe the process without stopping production | Extrusion, stranding, armoring, marking, rewinding, and general process controls |
The ITP should also state the required notification period, sample selection authority, inspection location, language of records, equipment requirements, retest rules, and the signatures needed for release.
Traceability links the finished cable drum to the production records and principal materials used. A FAT should verify that the construction presented for inspection is the construction approved in the contract.
| Item | Records or Checks |
|---|---|
| Optical fiber | Fiber manufacturer, fiber category, batch or reel identification, attenuation data, and proof-test documentation |
| Loose tube | Material, color, batch, tube allocation, and fiber arrangement |
| Strength member | Steel, FRP, aramid yarn, or messenger specification and batch traceability |
| Water blocking | Filling compound, water-blocking tape, or yarn identification and qualification |
| Armor and moisture barrier | Material type, thickness, coating, overlap, and supplier record |
| Sheath compound | PE, LSZH, PVC, or project-defined compound, batch number, and supplier certificate |
| Finished cable | Production lot, machine or line record, date, shift, operator, test record, and assigned drum number |
Traceability requirements should be proportional to project risk. A large operator tender may require more extensive material documentation than a small commercial purchase, but the exact cable model, drum number, production date, and test records should always remain clear.
Visual and dimensional inspection should confirm that the finished cable matches the approved drawing and datasheet. Sample locations and measurement methods should be defined before cutting or opening cable sections.
Product-specific construction must remain consistent with the approved design. Examples include GYTS, GYTA53, GYFTY, and ADSS.
The contract should state whether every production drum requires optical attenuation, continuity, length verification, OTDR records, or another defined routine test. The FAT should verify both the measured results and the traceability of those results to the exact drum.
| Optical Check | Record Should Include |
|---|---|
| Fiber continuity | Drum number, fiber number, test result, and any broken or crossed fiber finding |
| Attenuation | Wavelength, measured length, test direction, method, equipment identification, limit, and result |
| OTDR where required | Wavelength, pulse width, index setting, range, launch arrangement, trace file, and event review |
| Cable length | Meter-marking result, machine record, optical length where applicable, and contractual tolerance |
| Attenuation uniformity | Any unusual step, discontinuity, localized loss, or result requiring investigation |
Test equipment should be suitable for the required wavelength and measurement uncertainty. The inspector should verify that drum labels, test files, printed reports, and production records use the same drum identifier.
Mechanical tests may be type tests, periodic tests, production sample tests, or FAT witness tests depending on the contract. They should not automatically be repeated on every drum. The applicable test method, sample preparation, loading condition, duration, monitored optical parameters, and pass criteria must be defined.
| Property | FAT Review Points |
|---|---|
| Tensile performance | Sample length, applied load, loading rate, duration, attenuation monitoring, fiber strain where required, and residual damage |
| Crush resistance | Plate dimensions, applied force, duration, sample location, attenuation change, and post-test inspection |
| Impact resistance | Impact energy, impact count, impact location, optical monitoring, and physical damage limit |
| Repeated bending | Mandrel or sheave diameter, load, cycle count, attenuation change, and sheath condition |
| Torsion | Gauge length, twist angle, applied tension, cycle count, attenuation, and visible damage |
| Bend radius | Installation and operating limits consistent with the approved cable design |
IEC 60794-1-101 provides tensile-performance test procedures, while IEC 60794-1-104 addresses impact-performance procedures. The buyer still needs to specify the required test condition and acceptance threshold for the particular cable and application.
Environmental tests are often reviewed as valid type-test evidence rather than repeated during every FAT. The inspector should verify that the tested specimen is representative of the supplied cable family and that the report is relevant to the contracted construction.
IEC 60794-1-201 covers temperature cycling assessed through attenuation change. IEC 60794-1-212 is a different method for cables whose elements are fixed at both ends and where no end movement is intended. The FAT record should identify which method was applied rather than citing only the general IEC 60794 series.
A numerical result is not reliable unless the measuring equipment, procedure, operator, units, limits, and sample identification are controlled.
The FAT procedure should define what happens when a result falls outside the specification, a record is missing, the cable construction differs from the approved drawing, or a drum has visible damage.
| Required Control | Questions to Resolve |
|---|---|
| Nonconformity report | What requirement failed, which material or drums are affected, and how is the finding contained? |
| Root-cause review | Was the issue caused by material, process, test method, equipment, handling, or documentation? |
| Corrective action | Will the cable be repaired, reworked, replaced, re-tested, reclassified, or rejected? |
| Retest authorization | Who approves the retest, how is the new sample selected, and does the original failure remain recorded? |
| Concession | Does the buyer formally accept a deviation, and are technical, warranty, price, and schedule effects documented? |
| Lot disposition | Does a sample failure affect one drum, one production batch, or the entire shipment? |
A failed result should never be deleted and replaced silently by a passing retest. The full sequence of the original result, investigation, corrective action, retest, and final buyer decision should remain traceable.
| Inspection Item | Acceptance Check |
|---|---|
| Cable sheath marking | Customer name, manufacturer, cable model, fiber count, year, standard, project code, and sequential meter marks |
| Drum number | Unique identifier consistent across cable marking, label, test report, packing list, and drum schedule |
| Drum length | Required standard length and approved tolerance; short drums separately identified and approved |
| Cable ends | Properly sealed, mechanically protected, and accessible where final testing is required |
| Drum condition | No unacceptable flange, barrel, bolt, nail, protrusion, moisture, handling, or structural damage |
| Drum label | Model, length, net and gross weight, dimensions, drum number, production date, direction of rolling, and destination |
| External protection | Specified lagging, waterproof covering, wrapping, edge protection, and lifting or handling marks |
The inspector should confirm that packing does not conceal unresolved damage and that the drum remains suitable for export transport, unloading, storage, and site handling.
Release documentation should identify exactly which drums are authorized for shipment. A general statement that “the order passed inspection” is not sufficient when individual drum numbers, lengths, test reports, or exceptions differ.
Conditional release should clearly state the remaining action, responsible party, deadline, and evidence required for closure.
FAT approval does not eliminate the need for careful loading. A conforming cable can still be damaged by incorrect lifting, rolling, drum orientation, blocking, or container securing.
| Inspection Item | Required Record | Status | Comments |
|---|---|---|---|
| Approved specification and drawing | Current revision | ||
| Approved ITP and test procedures | Signed documents | ||
| Fiber and material traceability | Batch and supplier records | ||
| Cable construction inspection | Inspection sheet and photographs | ||
| Cable diameter and sheath thickness | Measurement report | ||
| Fiber count and color code | Inspection result | ||
| Per-drum continuity | Routine-test report | ||
| Per-drum attenuation | Wavelength-specific results | ||
| Mechanical tests | Witness or valid test report | ||
| Environmental tests | Relevant qualification evidence | ||
| Equipment calibration | Valid certificates | ||
| Sheath marking and meter marks | Inspection record | ||
| Drum length and drum number | Drum schedule | ||
| Cable end sealing | Visual inspection | ||
| Drum and packing condition | Inspection photographs | ||
| NCR and punch-list closure | Approved disposition | ||
| Release note | Signed drum release | ||
| Container loading | Loading list and photographs |
These references define test frameworks and procedures. The purchase contract must still identify the exact cable standard, sample, load, duration, temperature range, optical monitoring condition, acceptance limit, reporting requirement, and approved equivalent method.
Send your purchase specification, cable model, quantity, drum schedule, test requirements, inspection level, and destination. MapleArashi can prepare the production documents, routine-test package, inspection checklist, drum release schedule, and technical response for your project.
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