NOVKER NK281 RJ45 Cable Tester and Fibre Optic Light Source Functions Malaysia

Network contractors frequently work with two different transmission systems on the same project: optical fibre for the backbone and copper Ethernet cable for the final equipment connections.

The NOVKER NK281 combines a stable optical light source with basic RJ45 network-cable testing functions. This makes it a practical field instrument for FTTH installers, CCTV contractors, structured-cabling teams and building-maintenance technicians.

Instead of carrying a basic optical light source and a separate RJ45 tester, technicians can perform several routine checks with one compact unit.

What Are the Main NK281 Functions?

The NK281 is designed to support both fibre optic and copper network-cable work.

Its main functions include:

Stable optical signal output
Multiple optical wavelength configurations
Fibre optic loss testing when paired with an optical power meter
RJ45 wire-sequence checking
Network-cable continuity testing
Open- and short-circuit identification
Network-cable length measurement up to approximately 300 metres

The exact optical wavelengths and supplied accessories depend on the selected configuration. Buyers should confirm the complete specification before ordering.

How Does the Stable Light Source Work?

The NK281 sends a controlled optical signal through a fibre cable.

An optical power meter connected at the opposite end measures the received signal. The technician compares the received value with an established reference to determine the total insertion loss of the fibre link.

The test can reveal whether the total loss from the following components is acceptable:

Fibre cable
Connectors
Adaptors
Fusion splices
Mechanical splices
Patch panels
Passive components
Cable bends

The NK281 does not measure insertion loss by itself. A compatible optical power meter is required.

Which Fibre Wavelengths Are Required?

The correct wavelength depends on the fibre type.

Single-mode fibre

Common single-mode testing wavelengths include:

1310nm
1550nm

This configuration is suitable for:

FTTH networks
Telecom links
Building backbones
CCTV fibre transmission
Factory networks
Campus connections

Multimode fibre

Common multimode testing wavelengths include:

850nm
1300nm

Multimode fibre may be found in data centres, server rooms, factories and internal building networks.

Different NK281 versions may provide different wavelength combinations. Confirm the actual output wavelengths before purchasing.

What Does the RJ45 Wire-Sequence Test Show?

A correctly terminated Ethernet cable must connect its conductors in the proper sequence.

The NK281 can assist technicians in identifying basic wiring conditions such as:

Correct pin sequence
Open conductor
Short circuit
Incorrect termination
Reversed or crossed conductor
Missing connection

This function is useful after installing or repairing RJ45 plugs, wall outlets and patch-panel connections.

A basic wire-map result can quickly determine whether a network problem is caused by the cable termination.

Why Is Cable-Length Measurement Useful?

Cable-length measurement helps technicians estimate the length of a connected network cable and investigate possible fault locations.

It may be useful when:

The cable route is concealed.
Existing drawings are unavailable.
A cable has not been labelled.
The technician needs to estimate material usage.
An open circuit may exist along the cable.
The installed cable length needs to be checked.

The NK281’s specified RJ45 test range should be confirmed for the selected version, with available product information indicating testing up to approximately 300 metres.

Actual performance may depend on cable type, connection condition and testing environment.

Can NK281 Certify Cat 6 or Cat 6A Cables?

No. Basic continuity, sequence and length testing are not the same as professional cable certification.

A certification tester measures performance parameters such as:

Insertion loss
Return loss
Near-end crosstalk
Attenuation-to-crosstalk ratio
Propagation delay
Delay skew
Resistance
Pass/fail compliance with a selected cabling standard

The NK281 is suitable for basic installation checks and troubleshooting. It should not be promoted as a replacement for a professional Cat 6 or Cat 6A certifier.

Can NK281 Trace a Network Cable?

Cable tracing normally requires a tone generator and a compatible probe.

The NK281’s wire-map and length functions should not automatically be described as cable tracing unless the purchased version includes a compatible tracing receiver.

For identifying one cable among many cables inside a rack, ceiling or distribution cabinet, consider a dedicated network cable tracer such as the NOVKER NK53 or another suitable cable-finder model.

Use the NK281 for optical-light-source and basic RJ45 testing, and a dedicated tracer when physical cable identification is required.

Why Is NK281 Useful for FTTH Contractors?

An FTTH technician may complete the optical-fibre installation but still face a customer complaint involving the internal Ethernet connection.

The problem may be located in:

Fibre drop cable
Optical connector
Router or optical network terminal
RJ45 patch cable
Wall socket
Internal network cable
Incorrect RJ45 termination

With the NK281, the technician can support both sides of the basic investigation:

Use its stable light source with a power meter to test fibre loss.
Use its RJ45 functions to check cable wiring and length.

Additional equipment may still be required for live-PON testing, advanced fibre troubleshooting or complete Ethernet certification.

Why Is NK281 Useful for CCTV Contractors?

Modern CCTV projects may use fibre optic links between buildings or over longer distances, followed by Ethernet cabling between switches and IP cameras.

The NK281 can help check:

Fibre-link loss
Building-to-building fibre connections
RJ45 wire sequence
Ethernet cable continuity
Approximate network-cable length
Basic cable faults after termination

This combination is especially suitable for contractors who work with IP cameras, fibre media converters and PoE network switches.

The NK281 does not directly test PoE voltage, network bandwidth or camera video. Separate test equipment may be required for these functions.

Application in Server Rooms and Data Centres

Server rooms contain a mixture of:

Fibre backbone cables
Copper patch cords
Network switches
Patch panels
Server connections
CCTV and access-control cabling

The NK281 allows maintenance teams to conduct basic checks on both fibre and RJ45 connections.

However, formal data centre fibre and copper certification may require higher-grade test equipment, calibrated reference cords and documented testing procedures.

The NK281 is better positioned as a practical installation and maintenance instrument.

NK281 vs Separate Test Instruments

NK281 combination approach

Advantages:

One compact field instrument
Supports fibre and copper work
Reduces the number of basic testers carried
Suitable for routine installation checks
Attractive for smaller contractors

Limitations:

Requires an external optical power meter for fibre-loss measurement
Does not replace an OTDR
Does not replace a professional copper cable certifier
May not provide advanced network troubleshooting

Separate professional instruments

Advantages:

More specialised testing capability
Better suitability for formal certification
Advanced fault analysis
Greater reporting and documentation options

Limitations:

Higher total investment
More equipment to carry
More training may be required

The right choice depends on the contractor’s project requirements.

Recommended NK281 Test Combination

For general FTTH, CCTV and structured-cabling work, consider:

NOVKER NK281
Compatible optical power meter
Suitable fibre reference patch cords
SC/UPC and SC/APC accessories as required
Fibre connector cleaner
Visual Fault Locator
Dedicated cable tracer
PoE or network tester when required
Protective carrying case

This provides broader coverage than purchasing the NK281 alone.

Who Should Buy the NK281?

The NK281 is suitable for:

FTTH installers
Fibre optic contractors
CCTV installers
Structured-cabling companies
Network technicians
Server-room maintenance teams
Factory IT departments
Building facility-management teams
Technical training centres

It is particularly suitable for users who regularly work with both fibre and RJ45 network cables.

Questions to Confirm Before Ordering

Before buying the NK281, confirm:

Which optical wavelengths are included?
Is it intended for single-mode or multimode fibre?
Which optical adaptors are supplied?
Is an optical power meter included?
What RJ45 cable types are supported?
What is the stated cable-length test range?
Does the version include remote wire-map equipment?
Is cable tracing required?
Are calibration or test reports required?
Which additional accessories are needed?

MTM Precision can help configure the product according to the customer’s fibre and network-cable application.

Contact MTM Precision

Contact us for the NOVKER NK281, NK53 cable finder, optical power meters, OTDRs and network cable testing equipment in Malaysia.

MTM Precision Sdn Bhd
No. 29-1 & 29-2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia.

Website: www.mtmpre.com.my
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com