BICSI Certification BICSI Copper Cabling Systems

Question 1

What is the characteristic impedance of standard twisted-pair telecommunications cabling as specified in ANSI/TIA-568?

Accepted Answer

100 ohms

Answer

50 ohms

Answer

75 ohms

Answer

120 ohms

Question 2

Which test parameter measures the difference in attenuation between a pair and the crosstalk on that same pair, indicating signal-to-noise margin?

Accepted Answer

ACR-N (Attenuation-to-Crosstalk Ratio, Near-end)

Answer

Answer

Return Loss

Answer

Propagation Delay

Question 3

What is 'alien crosstalk' (AXT) in copper cabling systems, and which category of cable introduced it as a critical test parameter?

Accepted Answer

Crosstalk from adjacent cables in a bundle; became critical with Category 6A

Answer

Crosstalk from the far end of a cable; became critical with Category 5e

Answer

Signal loss at connector terminations; became critical with Category 6

Answer

Interference from power cables; became critical with Category 3

Question 4

In a punch-down (IDC) termination, what is the correct technique to minimize crosstalk degradation?

Accepted Answer

Maintain pair twist as close to the termination point as possible (max 13 mm untwist)

Answer

Untwist pairs as far back as possible for easy termination

Answer

Use a 110-tool at 45 degrees to the block

Answer

Separate pairs by color group before punching down

Question 5

What is the maximum allowed propagation delay for a Category 6 channel at 100 MHz?

Accepted Answer

498 ns

Answer

370 ns

Answer

555 ns

Answer

800 ns

Question 6

Which field test instrument certification level is required by BICSI to certify Category 6A cabling for 10GBASE-T?

Accepted Answer

Level IIe

Answer

Level I

Answer

Level III

Answer

Level IV