Shielded and Unshielded Network Cables Analysis

This white paper provides a detailed examination of shielded versus unshielded network cables, focusing on their electromagnetic compatibility and suitability for various environments. It begins by defining electromagnetic interference (EMI) and electromagnetic compatibility (EMC), explaining the importance of these concepts in the context of electronic devices. The paper outlines the differences between shielded twisted-pair (STP) and unshielded twisted-pair (UTP) cables, detailing their respective advantages and disadvantages, particularly in terms of cost and performance under interference. It also categorizes digital devices into two classes as defined by the Federal Communications Commission (FCC), highlighting the differing emission requirements for commercial versus residential applications. The document concludes with recommendations for using STP cables in environments with high electromagnetic interference, particularly for Axis network cameras, while noting that UTP cables may suffice in less demanding settings. This analysis serves as a resource for understanding the implications of cable choice in network installations.