Three components: RF filter module, power line filter module, optional indicator — one-day installation for 50 machines, 1500-3500 dollars.

Three no-firmware methods: RF filter, power line filter, external bus monitor — no warranty risk, plug-and-play, 90-99% effectiveness.

Three scalability principles: modular hardware, centralized + distributed monitoring, standardized data format — scales 5 to 100+ machines.

Single-device strategy: identical RF filters + one portable monitor + adapter kit — 70-85% cheaper than model-specific devices.

Multi-protocol device + adapter kit + brand-specific profiles — auto-detects brand and protocol, 80-150 dollars per device.

Three solutions: protocol-agnostic physical layer, multi-protocol bus monitor, universal connector kit — 110-220 dollars per machine.

Three hardware components, four alert conditions, three delivery methods, three-step response protocol — 40-135 dollars.

Three components: write-once memory, cryptographic hashing, automated backup — 40-100 dollars hardware plus optional cloud.

Five components: tamper-evident seals, audit trail, bus recordings, CCTV, chain of custody — for legal and insurance.

RF filters and power line filters install outside the cabinet. External bus monitors available for some machine models.