220-801 · Question #20
Which of the following cable types is MOST often found in Plain Old Telephone Service (POTS)?
The correct answer is B. CAT3. CAT3 (Category 3) unshielded twisted pair cable is the traditional wiring used in POTS (Plain Old Telephone Service) installations.
Question
Which of the following cable types is MOST often found in Plain Old Telephone Service (POTS)?
Options
- ARG-6
- BCAT3
- CRG-59
- DMulti-mode
How the community answered
(37 responses)- B92% (34)
- C3% (1)
- D5% (2)
Why each option
CAT3 (Category 3) unshielded twisted pair cable is the traditional wiring used in POTS (Plain Old Telephone Service) installations.
RG-6 is a coaxial cable used for cable television, satellite dish connections, and broadband cable internet, not for telephone service.
CAT3 cable supports frequencies up to 16 MHz and was the standard wiring for analog telephone networks and early 10BASE-T Ethernet. POTS infrastructure, including residential telephone wiring and older PBX systems, relies on CAT3's two-pair (or four-pair) twisted pair construction, which is sufficient for the narrow bandwidth requirements of voice-grade telephone signals.
RG-59 is an older, thinner coaxial cable used for analog cable TV and CCTV applications, not for telephone wiring.
Multi-mode is a type of fiber optic cable used for high-speed data networking over short to medium distances and is not used in POTS infrastructure.
Concept tested: Cable types used in POTS telephone infrastructure
Source: https://standards.ieee.org/ieee/802.3/1095/
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