CTTK-51B Multipurpose Network LAN Cable Tester w/ 8 far-end Test Jacks

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The new instrument is provided with fluent appearance, excellent hand feel and considerate human-centered design. It owns three great functions of hunting, wire sorting and circuit status testing a...
$102.90 USD
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The new instrument is provided with fluent appearance, excellent hand feel and considerate human-centered design. It owns three great functions of huntingwire sorting and circuit status testing and the features of quickness and accuracy, thus, it becomes an available tool for technicians in installation and maintenance of a weak current system, such as communication line, comprehensive wiring circuit, etc.

It is widely applicable to a telephone system, computer network, other metal wire circuit, and other fields.


  1. One person enough to complete cable continuity check
  2. Check wiring error in 5E, 6E, telephone line, coaxial cable, USB cable and such as open circuit, short circuit, jumper wire, reverse connection or cross-talk interference
  3. Locate the wiring or connection error
  4. Measure cable length and determine the distance of open circuit and short circuit
  5. Dynamically calibrate cable length
  6. Portable unit
  7. Automatically time-delay shut off
  8. Backlight display function
  9. Measure length and pair with or without far-end recognizer
  10. Far-end recognizer with prompting voice
  11. Self-checking function
  12. Single board computer software watchdog design 


  • Display: 4 x 16 character big screen LCD
  • Type of cable tested:
    • STP/UTP twin twisted cable
    • Coaxial cable
    • telephone line
  • Type of cable detected
    • 5E
    • 6E
    • telephone wire
    • coaxial cable
    • USB cable and other metal wires
  • Ambient temperature : -10°C ~ +60°C
  • Tester Port
    • Tester RJ45 mater port (M), tester LOOPBACK RJ45 port (L), hunting RJ45 port (with RJ45);
    • The RJ11-to-alligator converters are used to measure and check the continuity of coaxial cable and telephone line.
  • Length measurement of Twin Twisted Cable:
    • Scope : 1~350M (3~200ft)
    • Calibration accuracy : 3% (+/-0.5M or +/-1.5ft)(calibrating cable >5M)
    • Shipment accuracy : 5% (+/-0.5M or +/-1.5ft).(AMP, AT&T Class 5 cable)
    • Display: M or ft
  • Length Calibration: user can set calibration factor by himself with a given length cable. The length of calibrating cable more than 5M
  • Wire Sequence and Locating Cable Error:
    • >>Checks errors such as open circuit, short circuit, reverse connection, cross-over or cross-talk interference.
  • Locating Cable: 8 remote identifier test jacks (ID1 > ID8) (8 far-end test jacks are included in set)
  • Automatic time-delay shut Off time: the tester does not operate for 30 minutes.
  • Overall Dimension
    • Main tester : 185 x 105 x 50mm
    • Receiver : 218 x 46 x 29mm
    • Remote identifier : 84 x 34 x 27mm
  • Power : Two (2) 9V batteries (included)

Set includes:

  • 1 x Main unit tester
  • 1 x Receiver
  • 8 x far-end passive test jacks (ID no.ID1-ID8)
  • 1 x Earphone
  • 1 x RJ45 Cable
  • 1 x RJ11 Cable
  • 2 x 9V Batteries 
  • 1 x RJ11-to-Alligator converter
  • 1 x English Instruction manual   

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund in the same payment form used at the time of purchase within four weeks of giving your package to the return shipper. This time period includes the transit time for us to receive your return from the shipper, the time it takes us to process your return once we receive it, and the time it takes for the refund to be credited to your account.

For more information, please refer to our Return, Refund & Warranty Policy or contact us.

Shipping Policy

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

For more information, please refer to our Shipping Policy.

Warranty Policy

Most of our items come with 1 year warranty for manufacturer defects. It does not include damage caused by misuse, accidents, abuse, alterations, neglect or other external causes.

The warranty will not extend to consumables (i.e. electrodes, calibration solution, battery, index oil), accessories, cable, compact disk and/or any written document bundled with the item.

For more information, please refer to our Warranty Policy.

1-Year Warranty
30-Day Returns
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