RCDD (RCDD): Case Studies and Concepts 2 — Questions and Answers
Question 1: A hospital is upgrading its nurse call system and wants to integrate it with the structured cabling infrastructure. Which ANSI/TIA standard should the RCDD reference to ensure proper telecommunications pathways and spaces for healthcare environments?
- ANSI/TIA-568-C.2
- ANSI/TIA-1179 (Correct answer)
- ANSI/TIA-607-C
- ANSI/TIA-862-B
Correct answer: ANSI/TIA-1179
ANSI/TIA-1179 addresses telecommunications infrastructure standards specifically for healthcare facilities.
Question 2: During a data center design review, the RCDD notices that the proposed hot aisle/cold aisle containment layout has cables running across the top of open racks without management. What is the primary concern?
- Cable runs will violate fire codes
- Airflow disruption will reduce cooling efficiency (Correct answer)
- EMI interference will degrade signal quality
- Cable bend radius will be exceeded
Correct answer: Airflow disruption will reduce cooling efficiency
Unmanaged cables across the top of open racks in a contained aisle environment disrupt airflow patterns and reduce cooling efficiency.
Question 3: A university campus is deploying a new fiber backbone connecting 12 buildings. The design requires single-mode fiber. Which fiber type is recommended per ANSI/TIA-568.3-D for new campus backbone installations?
- OS1
- OS2 (Correct answer)
- OM3
- OM5
Correct answer: OS2
OS2 (ITU-T G.652.D) single-mode fiber is the preferred type for new outside plant and campus backbone installations per TIA-568.3-D.
Question 4: An RCDD is designing a telecommunications room that serves 200 work area outlets. According to ANSI/TIA-569-D, what is the minimum recommended floor area for this TR?
- 10 m²
- 14 m²
- 9 m² (Correct answer)
- 22 m²
Correct answer: 9 m²
ANSI/TIA-569-D specifies a minimum of 9 m² for a telecommunications room regardless of the number of outlets served.
Question 5: A customer asks the RCDD to design a system where Wi-Fi access points can receive power over the Ethernet cable. Which IEEE standard governs the PoE technology that supports up to 90 W at the PSE?
- IEEE 802.3af
- IEEE 802.3at
- IEEE 802.3bt (Correct answer)
- IEEE 802.3az
Correct answer: IEEE 802.3bt
IEEE 802.3bt (PoE++) supports up to 90 W at the Power Sourcing Equipment (PSE), enabling high-power devices on four-pair cabling.
Question 6: In a case study involving an open-plan office renovation, the RCDD must determine the maximum allowable horizontal cable length. The consolidation point adds 5 m of patch cord at the work area and 3 m at the TR. What is the maximum allowable horizontal cable run?
- 90 m
- 85 m (Correct answer)
- 92 m
- 80 m
Correct answer: 85 m
With 8 m total allocated for equipment/patch cords, the horizontal cable run is limited to 90 m − 5 m = 85 m to keep the channel within 100 m.
Question 7: A new sports arena requires a DAS (Distributed Antenna System) for cellular coverage. Which body's guidelines should the RCDD consult when designing the pathways and spaces for the DAS antenna cabling?
- IEEE 802.11 working group
- BICSI TDMM (Correct answer)
- FCC Part 90
- NFPA 72
Correct answer: BICSI TDMM
BICSI's Telecommunications Distribution Methods Manual (TDMM) provides design guidance for DAS infrastructure including pathways, spaces, and antenna placement.
RCDD (RCDD): Case Studies and Concepts 2
A hospital is upgrading its nurse call system and wants to integrate it with the structured cabling infrastructure.
Which ANSI/TIA standard should the RCDD reference to ensure proper telecommunications pathways and spaces for healthcare environments?