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RCDD · Question #155

You are preparing to test newly installed open office cabling. Within the open office cabling, there are multiple consolidation points (CP) that were installed while waiting for furniture. How do…

The correct answer is B. Wait for open office cabling to be completed, then test to each workstation outlet, including the CP. TIA-568 requires that open office permanent link testing be performed on the complete end-to-end path from the horizontal cross-connect to each workstation outlet, with the consolidation point included as a passive midpoint.

Information Transport Systems (ITS) Distribution

Question

You are preparing to test newly installed open office cabling. Within the open office cabling, there are multiple consolidation points (CP) that were installed while waiting for furniture. How do you proceed with permanent link testing?

Options

  • ATest to each CP, then test from CP to workstation.
  • BWait for open office cabling to be completed, then test to each workstation outlet, including the CP.
  • CTest that the CP is within 90 meters, then test again to the workstation outlet.
  • DPerform permanent link tests to each CP, then continuity tests from CP to each workstation outlet.
  • ETest to each workstation outlet, treating each outlet as a channel.

How the community answered

(18 responses)
  • B
    72% (13)
  • C
    6% (1)
  • D
    17% (3)
  • E
    6% (1)

Why each option

TIA-568 requires that open office permanent link testing be performed on the complete end-to-end path from the horizontal cross-connect to each workstation outlet, with the consolidation point included as a passive midpoint.

ATest to each CP, then test from CP to workstation.

Testing only to the CP and then separately from the CP to the outlet creates two partial segments that do not constitute a valid TIA-568 permanent link test.

BWait for open office cabling to be completed, then test to each workstation outlet, including the CP.Correct

TIA-568 defines the permanent link as spanning from the horizontal cross-connect to the workstation outlet, and a consolidation point is a passive junction embedded within that single link - not an endpoint. Testing must occur on the complete permanent link, so testing before all outlets are in place would yield incomplete, non-compliant results that do not represent the actual installed channel.

CTest that the CP is within 90 meters, then test again to the workstation outlet.

Verifying CP distance and re-testing to the outlet is not a recognized TIA-568 test procedure and does not validate permanent link performance in a single compliant measurement.

DPerform permanent link tests to each CP, then continuity tests from CP to each workstation outlet.

Performing permanent link tests only to the CP and continuity tests from the CP to the outlet omits required performance verification of the outlet segment.

ETest to each workstation outlet, treating each outlet as a channel.

Treating each outlet as a channel conflates the channel model - which includes patch cords and equipment cords - with the permanent link model, using the wrong test adapter configuration.

Concept tested: Open office permanent link testing with consolidation points

Source: https://www.tiaonline.org/standard/tia-568-1-d/

Topics

#permanent link#consolidation point#open office cabling#testing procedure

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