What "100% Tested" Actually Means — and Why Most Cabling Isn't

Almost every cabling company will tell you they test their work. It's one of those phrases that sounds like a guarantee but often isn't — because "tested" covers everything from a thirty-dollar continuity check to a full, documented certification against international standards. Those are wildly different things, and on the day your network is installed, you can't tell which one you got. The difference only shows up later, usually at the worst possible time.

If you're paying for a cabling installation, understanding what real testing means is one of the most valuable things you can learn. Here it is.

Three Levels of "Testing"

There's a hierarchy, and the gap between the bottom and the top is enormous.

Verification (wiremap and continuity). The most basic check confirms that the pairs are connected to the right pins, with no opens, shorts, miswires, or split pairs. A cheap handheld tester does this in seconds. It answers one question: *is it wired correctly?* That's genuinely useful — but it tells you nothing about whether the link will actually carry the speed you need. A cable can pass a wiremap test and still fail to run 10 Gigabit. When a company says "we test every cable," this is very often all they mean.

Qualification. A step up, qualification testing checks whether a link can support a specific application — "can this run 1 Gigabit?" It's more than a wiremap but still falls short of measuring the link against the full standard.

Certification. This is the real thing. Using a certification-grade field tester — a Fluke DSX-class instrument — the installer measures the link against the complete TIA or ISO standard for its category: insertion loss, return loss, near-end and far-end crosstalk, power-sum crosstalk, propagation delay, delay skew, length, and wiremap. The tester compares every measured value against the specification and returns a clear PASS or FAIL, with the actual numbers and the margin by which each parameter passed.

Certification is the only level that proves your installation meets the Cat 6 or Cat 6A specification it was sold as. Everything below it is a partial answer.

Permanent Link vs. Channel

There's one more piece of vocabulary worth knowing, because it separates people who understand testing from people who just own a tester.

Certification is run in one of two configurations. The permanent link is the fixed cabling — from the patch panel in the closet to the outlet in the wall — which is exactly the portion the installer is responsible for. The channel includes the patch cords and equipment cords on each end too, for a true end-to-end measurement.

Reputable installers certify the permanent link, because that's their scope of work and the part they can stand behind. The channel includes patch cords the customer may swap out next week, components the installer never supplied. When someone hands you certification results, knowing which configuration was tested tells you exactly what was — and wasn't — proven.

Why Certification Actually Matters

This isn't testing for testing's sake. A certification report does four concrete things for you.

It's documented proof, per link. Not a verbal "yeah, it's good" — an actual report showing that each connection meets the standard, with the measured values to back it up. If a dispute ever arises about whether the cabling was installed correctly, the data settles it.

It's the basis of your warranty. This is the one most building owners don't realize. Manufacturers don't grant their extended or lifetime warranties on faith — they require certification reports as evidence the system was installed to specification. No certification, no manufacturer-backed warranty. A "lifetime warranty" from an installer who never certified the links is a promise resting on nothing.

It catches the marginal installs. Plenty of cabling "works" on day one and fails later — under a hot summer in a non-conditioned ceiling, under the load of PoE devices, or the moment you try to push it past 1 Gigabit. Certification surfaces the links that are technically functional but have no margin, *before* they become an outage.

It's your troubleshooting baseline. When something breaks in year five, the original certification data tells you what "good" looked like on day one. Without it, you're diagnosing blind.

So Why Doesn't Everyone Do It?

Because real certification is expensive and slow, and the customer usually can't tell the difference at handover.

A certification-grade tester is a five-figure instrument that has to be kept in calibration and run by someone trained to use it and interpret the results. Testing every link in a building takes real hours — hours that show up in the bid. So the temptation, for a company competing on price, is to skip certification, run a quick wiremap instead, and call it "tested." The network powers on, the customer is satisfied, and nobody's the wiser.

Until the cabling gets pushed — by higher speeds, by PoE heat, by time — and the links that were never actually proven to spec start to fail. By then the low bid doesn't look like such a bargain.

How O.B. One Defines "Done"

We certify 100% of every link with Fluke test equipment, and we hand you the documented reports. Every connection is measured against the full standard for its category, and that certification is precisely what stands behind our 100% lifetime warranty — because a warranty is only as credible as the evidence beneath it.

We test everything not because it's quick or cheap, but because certification is the only honest definition of a finished installation. Anything less is handing you a network and hoping.

The Bottom Line

When a cabling company tells you they test their work, ask one question: *do you certify every link and hand over the reports?* The answer separates verification from certification, a warranty worth having from a warranty worth nothing, and cabling that's genuinely finished from cabling that merely turns on.

You're going to trust this infrastructure with your business for the next twenty years. Insist on proof that it was built to carry the load.