Intelligentes Gebäude

Unterwegs: Normen für die Prüfung von Steckern und Buchsen

Ron Tellas

Ob ein Netzwerkkabel die von Ihnen benötigte Bandbreite und Kapazität bieten kann, hängt von der installierten Leistung ab: Hält das Kabel, was es verspricht, wenn es installiert ist?

Wenn die Kabel beim Ziehen beschädigt werden, die Verbindungen nicht richtig angeschlossen sind, die Kabel falsch hergestellt wurden oder die Umgebung die gewünschte Netzwerkleistung nicht zulässt, kann es sein, dass das Kabel nicht die erwartete Leistung erbringt. Aus diesem Grund muss sichergestellt werden, dass die Verkabelung und die Komponenten nach Abschluss der Installation bestimmte Parameter erfüllen.

Durch die Prüfung der Kabel wird sichergestellt, dass die Installationsarbeiten gemäß den erforderlichen Standards durchgeführt wurden, dass keine Schäden aufgetreten sind und dass alle Verbindungen ordnungsgemäß angeschlossen sind, um die von Ihnen erwartete Leistung zu erbringen. Wenn Probleme gefunden werden, können sie frühzeitig behoben werden, um unerwartete Ausfallzeiten und Frustration zu vermeiden.

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:

  1. Install the tester and remote unit on both sides of the permanent link
  2. Select the cable type to be tested
  3. Select the “permanent link” limit with the appropriate category and standards
  4. 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:

  1. Install the tester and remote unit on both sides of the permanent link
  2. Select the cable type to be tested
  3. Select the “MPTL” limit with the appropriate category and standards
  4. Test all permanent links
REVConnect-MPTL_width=381&name=REVConnect-MPTL.jpg 

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:

  1. Install the tester and remote unit on both sides of the permanent link
  2. Select the cable type to be tested
  3. Select the “permanent link” limit with the appropriate category and standards
  4. Test all permanent linksPlug-to-Jack_width=172&name=Plug-to-Jack.jpg
 

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.