DCI Testing and Certification 4

Question 1

What test parameter is used to certify that alien crosstalk meets specification in 10GBASE-T installations using Category 6A cable?

Accepted Answer

PS-ANEXT and PS-AACRF

Answer

PS-ANEXT (Power Sum Alien Near-End Crosstalk) and PS-AACRF (Power Sum Alien Attenuation-to-Crosstalk Ratio at the Far End) are the critical alien crosstalk parameters for 10G copper certification.

Question 2

What is the minimum bend radius for a Category 6 UTP cable during installation to avoid performance degradation?

Accepted Answer

4 times the cable diameter

Answer

TIA-568 recommends a minimum bend radius of 4 times the cable outside diameter for UTP cables during and after installation to prevent pair deformation.

Question 3

Which fiber optic loss budget component accounts for signal degradation from bends, splices, and connectors cumulatively?

Accepted Answer

Link Power Budget

Answer

The Link Power Budget is the total allowable loss for a fiber link, calculated from the transmitter output power minus the minimum receiver sensitivity, against which all losses are measured.

Question 4

A field tester uses 'Autotest' mode. Which of the following is NOT typically included in a copper channel Autotest for Category 6?

Accepted Answer

Chromatic Dispersion

Answer

Chromatic Dispersion is a fiber optic parameter related to pulse spreading; copper cable Autotests measure wire map, insertion loss, NEXT, FEXT, return loss, propagation delay, and delay skew.

Question 5

What does the TIA-568 'channel' model include that the 'permanent link' model does not?

Accepted Answer

Patch cords at both the telecommunications room and the work area

Answer

The channel includes the permanent link plus the equipment patch cords at each end (up to 10 meters total), representing the complete end-to-end path from equipment to equipment.

(DCI) Data Cabling Installer Practice Test

(DCI) Data Cabling Installer Practice Test

DCI Testing and Certification 4