What is the recommended max cable run length for Ethernet in a VDV installation?

• A. 200 meters
• B. 150 meters
• C. 100 meters
• D. 75 meters

Answer: (C)

The recommended maximum cable run length for Ethernet in a Voice-Data-Video (VDV) installation is 100 meters. This standard is based on the specifications set forth by the Institute of Electrical and Electronics Engineers (IEEE) and the Telecommunications Industry Association (TIA). The 100-meter limit ensures that the signal remains strong and reliable, minimizing latency and the potential for data loss.

This length includes both the horizontal cabling from the wall outlet to the network switch or hub, as well as the patch cables used in between. Exceeding this distance can lead to attenuation, where the signal weakens over the length of the cable, resulting in degraded performance and connectivity issues. By adhering to the 100-meter maximum, installations can maintain optimal network performance and reliability, which is crucial in environments where voice and data transmission quality is paramount.