1) General requirements
1. each installed cable line should undergo a standardized consistency test, which is the "4 to 100 Ω 6 category Cable Transmission Performance Indicator" of the telecommunications industry association TIA "; ANSI/TIA/EIA-568-B.2-1, that is, "TIA 6 class standard ".
2. the horizontal twisted pair link should be installed from the IDF intermediate distribution frame in the communication room) to the wall communication socket in the work area should be tested-"permanent link", which is described in detail in the TIA6 standard.
3. All installed cable lines must undergo a 100% test and pass the requirements mentioned in the standard. For more information, see the relevant sections in the standard. Any failed link must be diagnosed and corrected. After the correction, a test should be conducted again to prove that the modified link has met the performance requirements. The final test results of all links should be recorded in the test documents.
4. engineers who have received appropriate training and certificates should be invited to perform tests. Appropriate training should include certification testing courses provided by BiCSi or ACP cable professional association, or training provided by tester manufacturers, such as CCTS training provided by fluke network.
5. The accuracy requirements of the Test Instrument should meet the level III accuracy described in the TIA 6 standard. The test instruments include appropriate interface adapters that must meet the accuracy requirements. The accuracy requirements for Channel configuration are defined in Table B .2 of standard Appendix B of TIA 6, which specifies the impact of permanent link test configuration baseline accuracy plus adapter ). The draft IEC61935-1 sets the level IV accuracy of the test instruments can also, but in any case, the test instruments manufacturer should provide a statement to support level III/IV accuracy description of the data. An example is shown below:
6. The testing instrument should be in the calibration period recommended by the manufacturer, so as to achieve the testing accuracy guaranteed by the manufacturer. The normal calibration cycle is January 1, December)
7. The test instrument interface adapter must be of high quality and the adapter cable should not be bent or wound.
8. To ensure that the cable system is "Open", the test plug should meet the minimum requirements specified by ANSI/TIA/EIA-568-B.2-1.
If the test plug cannot prove to meet these requirements, the cable system is a dedicated design and the user must use the special connectors specified by the manufacturer. Support data is required.
9. Whether the link to be tested passes or fails depends on the test parameters required by each standard. Any parameter failure or failure on the tested link * results indicate that the link fails. To achieve the complete pass result, the test result of any tested parameter must pass or pass *. The test instruments should not be marked with "*" when the result is at a critical value. [Some wire manufacturers have stricter requirements. When providing quality assurance certificates, they do not accept any passing results in a critical state, that is, they believe that * is also unqualified.]
10. The pass or failure results of each parameter are compared with the limit value specified by the standard. When the test result of a parameter is closer to the test threshold than that of the field test instrument, the result is marked with an asterisk *). The on-site testing instrument manufacturer must provide documents to help explain the results.
Optional requirements:
11. An End User representative should be invited to witness the field test. The user representative should be notified five working days before the test starts.
12. user representatives should randomly select the 5% installation link. End users or their authentication representatives) should test these random links and the results should be stored in a manner consistent with the test document report. The obtained test results should be compared with the data provided by the installation contractor. If more than 2% of the sample test reports pass/fail results differ from those provided by the installation contractor, the installation contractor shall perform a 100% retest at the cost of the installation contractor.
2) test parameters
For cat6 cabling systems, ANSI/TIA/EIA-568-B.2-1, that is, the TIA cat6 standard, detailed the parameters to be tested. All these parameters should be included in each link-side test. In order to obtain the complete side pass test results, all the test values at the specified frequency points should meet or exceed the limit value specified in the TIA 6 standard. The testing frequency range required by the six standards is 1-205 MHz.
ANSI/TIA/EIA-568-B.2-1, that is, TIA 6 standard requirements for testing parameters include: Wiring Diagram Wire Map), Length), Insertion Loss) or called Attenuation ), near-end crosstalk NEXT), Comprehensive near-end crosstalk PSNEXT), equivalent remote crosstalk ELFEXT), Comprehensive equivalent remote crosstalk PSELFEXT), Return Loss, transmission latency Propagation Delay) and the transmission Delay Skew ).
Attenuation crosstalk ratio ACR) and Comprehensive attenuation crosstalk ratio PSACR) are not the test parameters required by the TIA 6 standard. However, some cable manufacturers require such parameter results when providing quality assurance certificates.
3) file the test results
1. The test results of each link should be stored in the memory of the tester after testing the link.
2. All link-side test results stored in the tester should be transmitted to Windows software-based applications for preservation, maintenance, and inspection. Make sure that the test result data transmitted to the computer cannot be modified later.
3. Test results are stored on appropriate media with software programs that can be used for viewing, checking, printing, and selecting test results
4. A file containing all links tested should be printed, containing the necessary overview information, such as evaluation of Pass/failure, the date and time when the tester stores the test results, NVP rated transmission rate for cable type and computing length) Value
5. the electronic document information of each link, including the user and test site, the selected test standard, the information about the tester, the used Link interface adapter, and the version information of the tester and test standard.
6. Detailed test data for all the test parameters required by the standard
