2024年3月12日发(作者：)

The Specification of Field Test Requirements

for a Balanced Twisted-Pair Cabling System

I. Cat 6 Installation: field test requirements upon completion of the installation

A. General Requirements

1. Every cabling link in the installation shall be tested in accordance with the field

test specifications defined in the most recent draft of the ―Transmission

Performance Specifications for 4-pair 100 ? Category 6 Cabling‖ under

development by the Telecommunications Industry Association (TIA). At the time

of this writing, PN-3727 TIA/EIA Draft Standard – Draft 7, dated August 23,

2000 represents the most recent version. This document will be referred to as the

―TIA Cat 6 Draft Standard.‖

2. The installed twisted-pair horizontal links shall be tested from the IDF in the

telecommunications room to the telecommunication wall outlet in the work area

against the ―Permanent Link ‖ performance limits specification as defined in the

TIA Cat 6 Draft Standard.

3. 100% of the installed cabling links must be tested and must pass the requirements

of the standards mentioned in I.A.2 above and as further detailed in Section I.B.

Any failing link must be diagnosed and corrected. The corrective action shall be

followed with a new test to prove that the corrected link meets the performance

requirements. The final and passing result of the tests for all links shall be

provided in the test results documentation in accordance with Section I.C below.

4. Trained technicians who have successfully attended an appropriate training

program and have obtained a certificate as proof thereof shall execute the tests.

Appropriate training programs include but are not limited to installation

certification programs provided by BiCSi or the ACP (Association of Cabling

Professionals).

5. The test equipment (tester) shall comply with the accuracy requirements for the

proposed level III field testers as defined in the TIA Cat 6 Draft Document. The

tester including the appropriate interface adapter must meet the specified accuracy

requirements. The accuracy requirements for the permanent link test configuration

(baseline accuracy plus adapter contribution) are specified in Table B.2 of Annex

B of the TIA Cat 6 Draft Standard. (Table B.3 in this TIA document specifies the

accuracy requirements for the Channel configuration.)

6. The tester shall be within the calibration period recommended by the vendor in

order to achieve the vendor-specified measurement accuracy.

7. The tester interface adapters must be of high quality and the cable shall not show

any twisting or kinking resulting from coiling and storing of the tester interface

adapters. In order to deliver optimum accuracy, preference is given to a permanent

link interface adapter for the tester that can be calibrated to extend the reference

plane of the Return Loss measurement to the permanent link interface. The

contractor shall provide proof that the interface has been calibrated within the

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period recommended by the vendor. To ensure that normal handling on the job

does not cause measurable Return Loss change, the adapter cord cable shall not be

of twisted-pair construction.

8. The Pass or Fail condition for the link-under-test is determined by the results of

the required individual tests (detailed in Section I.B). Any Fail or Fail* result

yields a Fail for the link-under-test. In order to achieve an overall Pass condition,

the results for each individual test parameter must Pass or Pass*.

9. A Pass or Fail result for each parameter is determined by comparing the measured

values with the specified test limits for that parameter. The test result of a

parameter shall be marked with an asterisk (*) when the result is closer to the test

limit than the accuracy of the field tester. The field tester manufacturer must

provide documentation as an aid to interpret results marked with asterisks.

Optional Requirements:

10. A representative of the end-user shall be invited to witness field testing. The

representative shall be notified of the start date of the testing phase 5 business

days before testing commences.

11. A representative of the end-user will select a random sample of 5% of the

installed links. The representative (or his authorized delegate) shall test these

randomly selected links and the results are to be stored in accordance with the

prescriptions in Section I.C. The results obtained shall be compared to the data

provided by the installation contractor. If more than 2% of the sample results

differ in terms of the pass/fail determination, the installation contractor under

supervision of the end-user representative shall repeat 100% testing and the cost

shall be borne by the installation contractor.

B. Performance Test Parameters

The test parameters for Cat 6 are defined in TIA Cat 6 Draft standard, which refers to

the TIA/EIA-568-B.2

standard. The test of each link shall contain all of the following parameters as

detailed below. In order to pass the test all measurements (at each frequency in the

range from 1 MHz through 250 MHz) must meet or exceed the limit value

determined in the above-mentioned draft standard.

[Optional Requirement – can only be combined with option (a) in Section I.C.6.]

Each parameter shall be measured from 1 through 350 MHz and all of these

measurement points are to recorded in the test results information as detailed in

Section I.C.6.

1. Wire Map

Wire Map shall report Pass if the wiring of each wire-pair from end to end is

determined to be correct.

The Wire Map results shall include the continuity of the shield connection if

present.

2. Length

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