Which type of network tester do you need?

19/07/2017

Which type of network tester do you need?

With some IT technicians unsure which network infrastructure testing equipment is the right choice for the job in hand, IDEAL Networks is offering some simple guidance to improve understanding of the different network layers and the different testers they require.

By understanding the different functions of the most common types of testers available and their typical applications, technicians can make the right choice, preventing downtime, avoiding poor customer satisfaction and ensuring jobs remain profitable and efficient.

When to choose a Cable Verifier

Verifiers are used in the Physical Layer or “Layer 1”. This layer of an Ethernet/IP system comprises of the electrical signaling and physical cabling components that connect devices on the network.  

Choose a Verifier to test electrical continuity of the cabling between two points, checking for shorts, opens, crossed and split pairs.   A Verifier may also offer troubleshooting functions such as measuring cable length and distance to fault, cable tracing with audible tone generation or visual port blinking, Ethernet service detection and PoE testing.  

Every cabling technician should carry a tester which acts as a Verifier to test every link after it is terminated, as more than 80% of all network problems can be traced back to a physical cabling fault – which a Verifier can quickly and simply detect.

When to choose a Cable Certifier

Technicians or installers that work on jobs where a cable manufacturer warranty is required, should choose a Certifier. Also used on Layer 1, a Cable Certifier uses radio frequencies on the cabling to measure performance to international ISO and TIA standards, providing a pass or fail result, ensuring that the cabling can support a wide range of applications.

Certifiers tend to require a larger financial investment, but many of the top end models have additional useful functionality, such as the ability to work on both copper and fibre cabling, troubleshooting, plus options to export a wider range of data and reports.

When to choose a Network Transmission Tester

To make the right choice of tester it is important to understand that Transmission Testers can offer functionality for testing across both Layer 2 and Layer 3 of an active network.  So, to select the right Network or Data Transmission Tester, it is important to understand the layers of the active network and how these testers can work differently.

Technicians that need to measure the successful transmission of data across a cable or through a network should choose a Layer 2 data Transmission Tester. Layer 2 is the data link layer which provides data transfer between two directly connected nodes or two nodes on the same network. It detects and corrects physical layer problems, provides Media Access Control (MAC), encodes and decodes data frames, performs error checking and also synchronises devices with systems. The result of the Layer 2 transmission test is a data loss ratio expressed as a percentage of total frames successfully transmitted or the number of dropped frames.

Technicians that need to test WANs (Wide Area Networks) to measure bandwidth between different locations across the Internet should choose a Layer 3 Transmission Tester as this will be capable of generating complete packets with IP addresses. Layer 3 is the Network Layer which provides data transfer between nodes on different networks. Layer 3 encapsulates Layer 2 frames inside of a data packet, adds source and destination IP address to each data packet and assigns an IP address that is unique to each node on ­its own network.

When to choose a Qualifier

This type of tester probably causes the most confusion when selecting equipment, especially as some people mistakenly select a Qualifier under the impression that it will conduct Layer 2 network testing.  However, Qualifiers do not generate Ethernet frames with a MAC address that can be read by active network devices, so a Qualifier is actually a Layer 1 tester. 

Also, as impressive as “qualifying” a cable may sound, this type of tester cannot be used to prove performance like a Certifier. This tester should only be chosen by those looking to conduct simulations to test whether the cable can successfully transmit data from point to point. However, many Layer 2 Transmission Testers also include this functionality, so may be a better use of hardware budget.

IDEAL Networks offers a wide range of data cable and network testing equipment, including Certifiers, Transmission Testers, Verifiers and Troubleshooting Testers.  For more information on which testers may best suit your needs, visit www.idealnetworks.net

Recent articles

  • Free October Webinar: LanTEK III certifier upgrades that will make your job easier 18/10/2018

    The next free webinar from IDEAL Networks takes place in October and will help data cable installers and network technicians learn about the latest enhancements to the LanTEK III cable certifier.

    Read more
  • Save more than £1,600 on Cable Testing Equipment with IDEAL Networks Rewards 11/10/2018

    Our Networks Reward end-of-year promotion is back, with some fantastic offers that could save you up to £1,615. 

    Read more
  • New touchscreen testers save time network testing and troubleshooting 03/10/2018

    IDEAL Networks has added touchscreens to several of its network and data cable testers to make troubleshooting and transmission testing quicker and easier than ever before.

    Read more
  • 4 IDEAL Networks Touchscreen Testers to Save You Time 01/10/2018

    We know that time is crucial for technicians testing and troubleshooting cable and network installations, so for faster and easier network troubleshooting, cable installation and transmission testing, we have introduced touchscreens to some of our popular IDEAL Networks testers.

    Read more
  • IDEAL Networks to showcase latest tester developments at GITEX 2018 25/09/2018

    IDEAL Networks will exhibit at GITEX from 14th – 18th October 2018 in Dubai to present recent enhancements to its wide range of network, data cable and IP CCTV testers.

    Read more