Brief Introduction to Jumper testing for easy-to-be-ignored cabling test links

I have encountered many patch cord-related faults and problems in the recent acceptance test and Network Test of cabling projects. Some "original jumpers" are fake and hand-made products. The recognition of jumper quality control is still a major problem.

End-to-End network device communication links are defined as Channel channels in the standard ). Some key transmission parameters of the channel, such as the near-end crosstalk (NEXT) and return loss (RL), are greatly affected by user and device jumpers. Over the years, engineering acceptance has primarily been tested using a permanent link model. An end-to-end performance guarantee is required when the cabling system provides services for network applications. This usually requires end-to-end Channel authentication tests on the entire cabling link. However, there is a feasible simple method to simplify the Secondary authentication test, that is, to perform the verification test on the jumper added to the link. In principle, when the fixed part of a channel link passes the permanent link test and the Jumper part passes the dedicated jumper standard test, the Channel link must pass the channel Authentication Test, therefore, in practical application, there is no need to spend a lot of manpower and resources to reauthenticate the channel. Instead, you only need to perform a dedicated Standard Authentication Test on the jumper to be used.

The key issue here is that we need to perform a special standard certification test for the jumper, instead of a general channel standard test), to test whether the Jumper meets the indicators specified in the standard, the Fluke DTX series jumper Test Adapter DTX-PCU6S provides a viable and correct way to verify that the Jumper meets the performance specifications specified by the standard.

DTX-PCU6S jumper test options are based on TIA and ISO/IEC standards to test Cat 5e and Cat 6 jumpers. The DTX-PCU6S jumper test kit includes a DTX-PCU6/MN adapter that connects to the DTX host and an adapter DTX-PCU6/SR that connects to the remote DTX. The test adapter meets the testing outlet indicators specified by TIA/EIA-568-B.2-1.

Test parameters include wiring diagram to ensure the correctness of the line connection, transmission latency, length and latency difference, and (one-way) near-end crosstalk (NEXT) and one-way) return loss. The measurement accuracy is calculated based on the provisions of TIA/EIA-568-B.2-1 and IEC 61935-1. The worst accuracy is based on the strict requirements of level III accuracy.

Tests have proved that these test adapters can still provide stable contact resistance after 15000 consecutive inserts. The surface plating layer in the socket may be completely rubbed off after so many inserts, but the plating layer does not increase or decrease the NEXT crosstalk and return loss (RL) parameter performance. The test takes only 9 seconds and then connects to the new jumper. The insertion sliding process can clean the connection point. Therefore, there will be no corrosion or aging of long-term contact resistance.

Conclusion:

Jumpers and device jumpers have a crucial impact on the performance of the data transmission network. We all want to install high-speed data links, such as Cat 5e/Class D or Cat 6, to support higher bandwidth and reliable high-speed data transmission. Unfortunately, user Jumpers are ignored in the building's cabling system. These Jumpers are usually purchased several months or years after the installation of the permanent link or fixed cable link. In addition, these Jumpers may only be purchased based on price considerations. Therefore, this conscious neglect often becomes the fault source of network applications. In actual tests, we can quickly test user jumpers or device jumpers within 6 seconds. For the patch cord market with quality parameters and difficulties, it is the "Photo-enchanting Mirror" of the units concerned with jumper quality ".

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