DCI Cabling Standards 4 — Questions and Answers
Question 1: What is the recognized bandwidth of Category 6A cabling per TIA-568-C.2?
- 250 MHz
- 350 MHz
- 500 MHz (Correct answer)
- 600 MHz
Correct answer: 500 MHz
Category 6A is specified to 500 MHz, which enables 10-Gigabit Ethernet over copper at full 100-meter channel lengths.
Question 2: Which BICSI publication provides installation practices and guidelines that complement TIA standards in the field?
- BICSI TDMM (Correct answer)
- BICSI ANSI-01
- BICSI ITS
- BICSI NEC Guide
Correct answer: BICSI TDMM
The BICSI Telecommunications Distribution Methods Manual (TDMM) is the primary installation reference used alongside TIA standards.
Question 3: In a TIA-568 structured cabling topology, what is the maximum number of transition points allowed in a horizontal cable run?
- None
- One (Correct answer)
- Two
- Three
Correct answer: One
TIA-568 allows a maximum of one transition point (TP) in a horizontal cable segment, in addition to the outlet and patch panel connections.
Question 4: According to NEC Article 800, indoor communications cables must be rated for what minimum fire characteristic when run in plenum spaces?
- CM (Communications general use)
- CMR (Communications riser)
- CMP (Communications plenum) (Correct answer)
- CMX (Communications residential)
Correct answer: CMP (Communications plenum)
NEC Article 800 requires CMP-rated (plenum) cables in air-handling plenums due to their low flame spread and smoke characteristics.
Question 5: Which TIA standard defines the 'Tier 1' and 'Tier 2' fiber optic testing methodologies?
- TIA-526-7 (Correct answer)
- TIA-568-C.3
- TIA-568-C.1
- TIA-455-78B
Correct answer: TIA-526-7
TIA-526-7 (OFSTP-7) defines the multimode optical power loss measurement method including Tier 1 and Tier 2 test requirements.
Question 6: What does ANSI/TIA-862 address in the context of building infrastructure?
- Power over Ethernet specifications
- Building Automation System (BAS) cabling (Correct answer)
- In-building cellular distributed antenna systems
- Underground conduit installation
Correct answer: Building Automation System (BAS) cabling
ANSI/TIA-862 is the Structured Cabling Infrastructure Standard for Intelligent Building Systems and Building Automation.
Question 7: When T568B wiring is used, which pair is connected to pins 1 and 2 of an 8P8C modular plug?
- Pair 1 (blue)
- Pair 2 (orange) (Correct answer)
- Pair 3 (green)
- Pair 4 (brown)
Correct answer: Pair 2 (orange)
In T568B, the orange pair (pair 2) is assigned to pins 1 and 2, which carry the primary Ethernet transmit/receive signals.
DCI Cabling Standards 4
What is the recognized bandwidth of Category 6A cabling per TIA-568-C.2?