Chapter 3: Scenarios & Selection

Cameras cover entrances, corridors, and elevator lobbies. Cabling runs above ceiling trays to IDF closets. The main risk is messy patching and mislabeling due to frequent office reconfigurations. Occupancy changes create recurring reconfiguration needs, making maintainability and documentation more critical than extreme weather hardening. PoE load is moderate, but thermal conditions in small IDF closets can cause switch instability if ventilation is inadequate.

Long outdoor cable runs along fences, poles, and gates present the most challenging environment for surveillance cabling. Distances vary widely; lightning and moisture ingress are the primary failure risks. Physical tampering is common in perimeter deployments — armored conduits should be used where cables are exposed below 3 m, and junction boxes should be mounted out of easy reach. Bandwidth may spike with motion detection at night when IR illumination activates, requiring uplink margin planning.

Cameras at ramps, entrances, and payment points operate in a harsh environment where dust and vibration can loosen terminations over time. IR illumination significantly increases PoE draw at night. Pathways often share space with power and ventilation systems, increasing EMI and physical damage risks. Maintenance windows are limited due to 24/7 vehicle access, so the design must prioritize quick component swap without extended downtime.

Cameras mounted at 8–15 m height on structural beams provide wide coverage of rack aisles. Lift and forklift operations create cable snagging risks if routing is not properly protected with conduit sleeves. Dust accumulation affects connectors and cabinet ventilation filters, requiring a periodic cleaning plan. The large floor area means long distances between camera clusters, making fiber distribution to zone cabinets the standard approach.

Multi-site retail deployments demand consistency and repeatability above all else. A standardized BOM and "golden" labeling scheme eliminates variability across hundreds of stores. Staff may inadvertently unplug cables or tamper with equipment, making physical protection and clear labeling critical for maintaining system integrity. Limited room for racks means compact wall-mounted cabinets with lockable doors are the standard enclosure choice.

Train stations, bus terminals, and airports require the highest density of cameras with 24/7 availability. Structural steel and concrete create complex pathway challenges. High passenger throughput means motion-triggered bitrate spikes are constant, requiring uplink bandwidth headroom. The public safety criticality demands redundant uplinks, UPS with extended runtime, and rapid fault response protocols with defined escalation paths.

Healthcare facilities require surveillance cabling that is unobtrusive, cleanable, and compatible with medical equipment EMC requirements. Privacy zones must be clearly defined and enforced at the VMS level, with cabling documentation supporting audit trails. The clean environment demands LSZH cables and flush-mounted conduit runs. Infection control areas may restrict access for maintenance, requiring longer service loops and accessible junction points outside restricted zones.

University campuses combine outdoor pedestrian areas, parking lots, building entrances, and indoor corridors into a single large-scale surveillance network. Fiber backbone runs between buildings are mandatory due to distances and lightning isolation requirements. The diverse environment requires different cabling strategies per zone: outdoor-rated fiber in buried conduit for inter-building runs, Cat6A for indoor drops, and weatherproof junction boxes for pole-mounted cameras. Phased expansion over academic years is common, requiring robust spare capacity planning.