On the Way: Standards for Plug and Jack Testing
Whether a category cable can deliver the bandwidth and capacity you need comes down to installed performance: Does the cable hold true to its promises once it’s installed?
If the cables are damaged during pulling, connectivity isn’t terminated properly, cables are manufactured incorrectly or the environment isn’t conducive to desired network performance, the cable may not perform as expected. For this reason, it’s crucial to make sure cabling and components pass certain parameters after installation is complete.
Cable testing verifies that the installation work was performed to required standards, no damage has occurred and all connectivity is terminated properly to provide the performance you expect. If problems are found, they can be fixed early to prevent issues with unexpected downtime and frustration.
ANSI/TIA-568C.2 is the current standard that cable should be tested to – it describes all elements of a structured cabling infrastructure, including requirements for cables, permanent links, connectors, hardware and patch cords. ANSI/TIA-568C.2 is currently being modified to include all current addendums, including Category 8 cable. The next version, which will be released in late 2018, will be called ANSI/TIA-568.2-D.
The updated version will also include a normative Annex F – Modular Plug Terminated Link, which performance can be measured and compared to for modular plug terminated links (MPTLs) – also known as Direct Connect. This connection method simplifies LAN infrastructure by allowing plugs to be placed at the ends of horizontal cabling and run straight to IP devices.
MPTLs are tested as jack to plug, and meet all requirements of a permanent link. Proper testing requires a permanent link adapter and patch cord test head. Below are methods for testing MPTLs and permanent link configurations. Each is accompanied by a figure that represents the testing topology.
Jack-to-Jack Tests
Requirements:
- Main and remote field testers
- Permanent link adapters (x2)
- Actual permanent link being tested
There are four steps to follow during jack-to-jack tests:
- Install the tester and remote unit on both sides of the permanent link
- Select the cable type to be tested
- Select the “permanent link” limit with the appropriate category and standards
- Test all permanent links
Plug-to-Jack Tests
Requirements:
- Main and remote field testers
- Permanent link adapter
- Patch cord test head
- Actual permanent link being tested
There are four steps to follow during plug-to-jack tests:
- Install the tester and remote unit on both sides of the permanent link
- Select the cable type to be tested
- Select the “MPTL” limit with the appropriate category and standards
- Test all permanent links
Plug-to-Jack Tests (Belden Alternative)
<pRequirements:- Main and remote field testers
- Permanent link adapters (x2)
- Belden coupler test adapter AX104552
- Actual permanent link being tested
There are four steps to follow during plug-to-jack tests:
- Install the tester and remote unit on both sides of the permanent link
- Select the cable type to be tested
- Select the “permanent link” limit with the appropriate category and standards
- Test all permanent links
REVConnect Testing
The Belden REVConnect Connectivity System is a form of Direct Connect, which allows contractors to terminate a jack or plug onto the same universal core interface; its universal wiring manager supports Category 5e, 6 and 6A cables. It allows field-terminable plugs used to support Category 6A and PoE applications to be terminated just as easily as a jack.
With REVConnect, a single termination process works for every application. You can switch from a jack to a plug or vice versa without having to re-terminate. Learn more here.
About the Author
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Ron joined Belden in 2016 to help define the roadmap of technology and applications in enterprise. Prior to this, he developed cables and connectivity for Panduit and Andrew Corp. Ron Tellas is a subject-matter expert in RF design and Electromagnetic Propagation. As a Technology and Applications Manager, Ron focuses on Local Area Networking. He represents Belden in the ISO WG3 committee, TIA TR42 Premises Cabling Standards, IEEE 802.3 Ethernet Working Group and served as a committee member of NFPA 70 Code-Making Panel 3. Ron is the inventor of 16 US patents. He has a Bachelor of Science degree in Electrical Engineering from Purdue University, a Master of Science degree in Electrical Engineering from Illinois Institute of Technology, and a Master of Business Administration from Purdue University.