Between the telephone MPOE and the RJ31X what should be used?

• A. Coax
• B. CAT5E
• C. Fiber
• D. Wireless

Answer: (B)

The connection between the MPOE and the RJ31X is a voice-grade copper link, so you want a twisted-pair cabling solution. CAT5E is the practical and appropriate choice because it is designed for voice and data, uses twisted pairs to minimize noise and interference, and is easy to terminate with standard connectors (RJ11 for telephone lines). It also provides flexibility if you need multiple conductors for future needs and is widely available and cost-effective for in-wall runs.

Coax, fiber, and wireless aren’t suitable for this specific telephone-line path: coax and fiber are for different services and higher-bandwidth needs, while wireless isn’t a physical wiring option for the line between the MPOE and the RJ31X.