Home › Glossary

Home Security Glossary

Every term the industry uses, explained without jargon. Each entry links to the reviews where it actually matters.

Hardware Concepts

Cellular Backup

Cellular backup is the LTE or 5G module in a security system's base station that keeps monitoring active when your home internet goes down — the most important feature most buyers miss.

Contract & Cost

Early Termination Fee (ETF)

An early termination fee (ETF) is the penalty you pay for cancelling a home security monitoring contract before the agreed term ends — ADT charges 75% of remaining months, which typically means $450-$900 for mid-contract cancellation.

Renter / Apartment / Situational

No-Drill Mount (Adhesive Mount)

A no-drill mount uses VHB (Very High Bond) or 3M Command adhesive strips to attach security sensors to door and window frames without making holes — the foundation of any renter-compatible security system.

Monitoring & Response

Professional Monitoring

Professional monitoring is a 24/7 central station service that receives alarm signals from your security system and dispatches police, fire, or medical services on your behalf.

Video Verification

Video verification is a professional monitoring feature where the central station reviews a live or recent camera clip before dispatching police — reducing false-alarm dispatches by approximately 60%.