The technician analyzes cabling requirements for moves, adds, changes, installations, and site expansions; determines pathways, media, termination, labeling, and separation requirements for classified and unclassified infrastructure; performs and certifies copper and fiber installations; maintains telecommunications rooms, patch panels, and as-built documentation; and supports VoIP, VTC, and network equipment installations under the direction of communications engineers. Analyze escalated Tier II voice and video incidents (VoIP desk phones, softphone clients, VTC endpoints, conference room audio-visual) to determine root cause among power, connectivity, registration, configuration, and infrastructure factors, and decide whether to resolve locally or escalate to engineers with documented findings.