AEM CuBLU III RJ45 cable tester with the UniBLU smartphone app

AEM CuBLU – RJ45 Cable and LAN Tester

AEM CuBLU RJ45 cable tester family: wiremap with 6 named faults, support for up to 16 remote IDs, tone and voltage detection. CuBLU II and III add length, per-pair resistance and reports in the UniBLU app. CuBLU III also has a PoE detection port for sources up to 90 W. A standard tester includes 1 remote; KIT packages include 16.

New · AEM Networks

CuBLU

Professional copper cable testing — without the certifier price.

AEM CuBLU is an RJ45 cable tester for installers who need more than a simple pass/fail continuity check, but do not need a full certifier. It detects and names faults on all eight conductors and the shield, while CuBLU II and CuBLU III turn every test into a documented result in the UniBLU app — with length, per-pair resistance and a PDF report.

Request a quote Brochure and manual ↓

AEM CuBLU III RJ45 cable tester with the UniBLU app on a smartphone

6named fault types

16supported remote IDs

7tone frequencies

45hbattery runtime

120mlength measurement (II/III)

197gtester weight

Where CuBLU fits

More than a continuity tester. Less than the cost of a certifier.

Verify every link, certify the ones you hand over with a system warranty. CuBLU is the tool for the first step — for every technician, on every cable.

Verify

“Is it wired right?”

Wiremap, pair checks, tone and voltage detection. CuBLU II and III with the UniBLU app add length and per-pair resistance measurements. Pass/fail verifies the wiring; it does not certify the cable category.

AEM CuBLU · CuBLU II · CuBLU III

Qualify

“Will the link carry 1G / 10G / PoE?”

Confirms a link supports a given application without the full standards test.

AEM NSA →

Certify

“Does it meet the category limit?”

Insertion loss, NEXT, return loss and the full TIA/ISO parameter set — the basis of a cabling manufacturer’s warranty.

AEM TestPro CV100 →

Three models

One tester, three levels of capability. Pick what the job needs.

CuBLU

Essential model

RJ45 wiremap: 8 conductors + shield
6 named fault types, including split pair
Up to 16 remote IDs shown on screen
Tone generator — 7 frequencies
Voltage detection up to 60 V DC
Single and continuous (loop) test

For installers and service teams: fast, reliable verification — no phone or app needed.

Part number: CUBLU

CuBLU II

With the UniBLU app

Everything in CuBLU, plus:

Bluetooth 5.4 and the free UniBLU app (iOS, Android)
Length up to 120 m and DC resistance per pair
PDF/CSV reports with your logo, projects and labels
Sync with Google Drive / OneDrive
Pass/fail for RJ11, RJ12, M12 and coax

For installation companies that hand over documented results.

Part numbers: CUBLU-II · CUBLU-II-KIT

CuBLU III

With the app and PoE

Everything in CuBLU II, plus:

Dedicated PoE test port
PoE detection up to IEEE 802.3bt (up to 90 W)
PoE type, class, voltage, power and powered pairs
PoE result in the UniBLU app

For CCTV, access control, Wi-Fi and smart building integrators.

Part numbers: CUBLU-III · CUBLU-III-KIT

Colour TFT display2600 mAh battery · 45 hUSB-C charging ~2 hAuto power-off126 × 74 × 35 mm · 197 g

Diagnostics

Not just pass or fail. Every fault has a name.

The tester screen shows the wiremap of 8 conductors and the shield, the remote ID and the fault name. The technician can see which conductors need checking and which type of fault was detected.

PASSCorrect wiring

All conductors and the shield connected 1:1.

OpenOpen circuit

A wire is broken or not connected — usually not seated in the IDC.

ShortShort circuit

Two or more conductors connected to each other.

MiswireMiswire

A wire lands on the wrong pin at the far end.

CrossoverCrossed pairs

Pairs 1-2 and 3-6 swapped — typically T568A at one end, T568B at the other.

Split pairSplit pair

Pin-to-pin continuity is correct, but the wires of a “pair” come from two different twisted pairs.

MultiMultiple faults

Several faults at once — e.g. a badly terminated end or a crushed cable.

Why is a split pair so dangerous?

A basic continuity tester may miss it. A split pair increases crosstalk and can cause transmission errors or an unstable link despite correct pin-to-pin continuity. Every CuBLU model detects split pairs.

Key features

Professional diagnostics — in your hand and in your pocket.

Wiremap and shield

Tests all 8 conductors and shield continuity up to 800 m — find the fault before the cable is patched and handed over.

Up to 16 remote IDs

Plug numbered remotes into a whole room and walk the patch panel once. The ID is shown on screen and in the report.

Tone generator

7 frequencies (800–1500 Hz) on all wires or selected pairs; works with standard tone probes.

Voltage detection

Before every test CuBLU checks the cable for voltage (up to 60 V DC) — protecting both the technician and the tester.

Length and DC resistance II · III

Length up to 120 m and per-pair resistance in the app help identify over-length links and high resistance. The measurement alone does not identify the conductor material.

PoE detection III

Identifies active PoE sources up to IEEE 802.3bt (90 W): type, class, voltage, power and powered pairs — no remote required.

Continuous (loop) test

The result refreshes in real time — wiggle the plug or cable and see where an intermittent fault appears.

45 hours of runtime

2600 mAh battery charged over USB-C from any charger or power bank — no AA cells in the toolbag.

Safety: never connect the tester to mains power or to voltage above 60 V DC. Disconnect the cable from live equipment before wiremap testing. Test PoE through the dedicated CuBLU III port, following the manufacturer’s instructions.

UniBLU app · CuBLU II and III

The report is ready before the crew leaves the building.

The free UniBLU app (iOS 15.5+, Android 11+) turns CuBLU II and III into a handover tool: projects, jobs, labels, results against limits and a report — straight from the phone.

UniBLU — home screen with a connected CuBLU tester

Home screen
tester, project, progress

Live preview
wiremap and pair length

UniBLU — PASS result saved under a label

Result and save
pass/fail under a label

UniBLU — length and DC resistance of each pair against limits

Pair details
length and resistance vs limits

Sample PDF report of a Cat 6A cable test

PDF or CSV report — with your logo

Wiremap, result and fault name for every cable
Length and resistance of each pair with limit and margin
Remote ID, cable and connector type, T568A/B scheme
Tester model and serial number, operator, date and time
Project export (.ubu) to TestDataPro and one report with FiBLU and TestPro results
Label printing from the same job (Brother PT-E550W)

Results in your own cloud. UniBLU syncs with your company’s Google Drive or OneDrive — no separate server and no vendor subscription. Testing also works offline.

Ownerlinks the company drive, issues access keys

Managerprojects and jobs, crew assignment, progress

Operatortests — results upload to the cloud when saved

Viewerclient or inspector — read-only access

Applications

Designed for real-world installations.

Structured cabling

Cat 5e–8 in offices, warehouses and campuses: verify every drop, identify with remotes, document for handover.

Smart buildings, CCTV and AV

IP cameras, access control, displays and sensors — wiremap, tone, voltage and, on CuBLU III, PoE checks.

Data centres

Moves, adds and changes and rack checks — fast fault isolation at rack level.

Electrical and low-voltage contractors

A step up from a continuity tester: named faults, split pairs, voltage safety, RJ11/RJ12, coax and M12.

Construction and fit-out

Find faults before walls and ceilings are closed. App-based records support a clean stage handover.

Enterprise IT and facilities

Office moves, suspect links, patching changes — result history for every site in UniBLU.

Technical data

AEM CuBLU, CuBLU II and CuBLU III specifications

Parameter	CuBLU	CuBLU II	CuBLU III
Wiremap interface and range	RJ45 8P8C · up to 800 m
Fault types	open, short, miswire, split pair, crossover, multiple faults
Shield detection · loop test	·	·	·
Cable length	—	up to 120 m	up to 120 m
DC resistance	—	per pair	per pair
Pass/fail on cable types	RJ45	RJ45, RJ11, RJ12, M12, coax	RJ45, RJ11, RJ12, M12, coax
Tone generator	7 frequencies (800–1500 Hz)
External voltage detection	up to 60 V DC
PoE detection	—	—	up to IEEE 802.3bt (up to 90 W)
Remote IDs	up to 16, number shown on screen
Bluetooth · app	—	5.4 · UniBLU (iOS, Android)	5.4 · UniBLU (iOS, Android)
Reports · cloud	—	PDF/CSV · Google Drive, OneDrive	PDF/CSV · Google Drive, OneDrive
Display	colour TFT LCD, battery indicator, auto power-off
Battery	2600 mAh, approx. 45 h runtime, USB-C charging approx. 2 h
Dimensions · weight	126 × 74 × 35 mm · 197 g
Operating · storage temperature	0…50 °C · −20…60 °C

Length, DC resistance and PoE results are displayed in the UniBLU app. Data according to AEM Networks documentation (brochure 10.2026, UniBLU User Manual v2.1); specifications subject to change by the manufacturer.

Kits and accessories

Ordering information

CUBLU	CuBLU tester with 1 remote (ID 1)
CUBLU-II	CuBLU II tester with 1 remote (ID 1)
CUBLU-III	CuBLU III tester with PoE test port and 1 remote (ID 1)
CUBLU-II-KIT · CUBLU-III-KIT	Professional kit: tester, full set of 16 remotes (ID 1–16), CUBLU-CORD-KIT adapter set, USB-C cable and charger
CUBLU-REM1 · CUBLU-REM16	Additional remote ID 1 · set of remotes ID 1–16
CUBLU-CORD-KIT	2× RJ45–RJ12 adapter (also RJ11), 2× RJ45–coax F, 2× RJ45–alligator, 2× RJ45 patch cord, soft case
CUBLU-ACC-KIT	2× RJ45 patch cord, USB-C cable, USB-C charger, soft case
CUBLU-TONE-PROBE	Noise-filtering tone probe

Downloads

CuBLU documentation

CuBLU brochure8 pages · PDF · AEM Networks
Download ↓

CuBLU product brief2 pages · features and specifications
Download ↓

UniBLU user manual v2.146 pages · FiBLU and CuBLU
Download ↓

Polish-language brochure, user manual, datasheet, quick start and installer guide prepared by Interlab are available on the Polish product page.

Before you buy

Frequently asked questions about the AEM CuBLU RJ45 cable tester

Does CuBLU certify cabling?

No. CuBLU verifies cabling: the wiremap and, on CuBLU II and III, length and per-pair resistance. Category certification and a system warranty require a certifier such as the AEM TestPro CV100. Results from both tools can be merged into one report in TestDataPro.

Do I need a phone and the app?

No. The essential CuBLU model works entirely on its own, and CuBLU II and III also test without a phone. The UniBLU app adds length, per-pair resistance, saved results, PDF/CSV reports and team collaboration.

What do the UniBLU app and cloud cost?

The app is free (iOS 15.5+, Android 11+). The cloud is your company’s own Google Drive or OneDrive — no vendor subscription, and the data stays within your organisation.

Which model should I choose for IP cameras and access points?

CuBLU III — it is the only model with a PoE test port and identifies power sources up to IEEE 802.3bt (90 W): type, class, voltage, power and powered pairs. For cabling verification alone, CuBLU II is sufficient.

What is in the KIT, and do the remotes fit all models?

CUBLU-II-KIT and CUBLU-III-KIT include the tester, a full set of 16 remotes (ID 1–16), RJ12/RJ11, coax F and alligator adapters, patch cords, a soft case, and a USB-C cable and charger. The remotes fit all CuBLU models.

Interlab · AEM Networks distributor

Request a quote for CuBLU testers and crew kits.

We will help you choose the right model and kit for your work and set up the UniBLU app.

Request a quote +48 22 840 81 80

[email protected] +48 22 840 81 80 ul. Kosiarzy 37 paw. 20, 02-953 Warsaw, Poland Manufacturer: AEM Networks

Meters & Fusion Splicers

Photonics & R&D

Monitoring Systems

Research & Scientific Instruments

AEM CuBLU – RJ45 Cable and LAN Tester

More than a continuity tester. Less than the cost of a certifier.

Verify

Qualify

Certify

One tester, three levels of capability. Pick what the job needs.

CuBLU

CuBLU II

CuBLU III

Not just pass or fail. Every fault has a name.

PASSCorrect wiring

OpenOpen circuit

ShortShort circuit

MiswireMiswire

CrossoverCrossed pairs

Split pairSplit pair

MultiMultiple faults

Why is a split pair so dangerous?

Professional diagnostics — in your hand and in your pocket.

Wiremap and shield

Up to 16 remote IDs

Tone generator

Voltage detection

Length and DC resistance II · III

PoE detection III

Continuous (loop) test

45 hours of runtime

The report is ready before the crew leaves the building.

PDF or CSV report — with your logo

Designed for real-world installations.

Structured cabling

Smart buildings, CCTV and AV

Data centres

Electrical and low-voltage contractors

Construction and fit-out

Enterprise IT and facilities

AEM CuBLU, CuBLU II and CuBLU III specifications

Ordering information

CuBLU documentation

Frequently asked questions about the AEM CuBLU RJ45 cable tester

Request a quote for CuBLU testers and crew kits.

📥 AEM CuBLU – brochure (EN)

📥 AEM CuBLU – product brief (EN)

📥 AEM UniBLU – user manual v2.1 (EN)

Ask about this product