What Types of Security Systems Can a Business Get Installed?
A commercial building is usually covered by four systems that are bought separately and should be designed together: video surveillance, access control, an intrusion alarm with monitoring, and intercom or door entry. Underneath all four sits the cabling and network that carry them, which is the part most quotes treat as an afterthought and the part that decides whether the other four work in five years.
Most businesses do not need all of it at once. The order that works is to fix the thing that is actually costing you something, then build out on cabling and a network that were sized for the whole plan from the start.
The Four Systems and What Each One Is Actually For
Video Surveillance
Cameras answer what happened. They are the system that settles disputes, supports an insurance or injury claim, resolves shrinkage between shifts, and tells you which vehicle was at the dock at 4am. Commercial systems record to an on-site recorder, to a server, or to a mix of local and offsite storage, and the design decisions that matter are detail level at each position, how many days of footage you keep, and who can pull a clip without calling someone. See commercial video surveillance for how we scope coverage.
Access Control
Access control answers who went where, and when, and it removes the single worst habit in commercial security: rekeying a building because one set of keys walked out. Credentials get issued and revoked in software, doors can be scheduled to unlock for business hours and lock for the rest, and every presentation of a badge or a phone is logged. For multi-tenant buildings, contractor access and after-hours cleaning crews are usually the reason it pays for itself. We install access control on hardware we are a licensed dealer for, including PDK, and we are a Brivo dealer with certification in progress.
Intrusion Alarm and Monitoring
An alarm answers whether anyone was told. Door and motion devices detect the event, and professional monitoring means a central station is notified around the clock and works your call list, contacting you, your emergency contacts and the authorities. Monitoring covers the notification service itself. Equipment repair and the internet or cellular path the panel reports over are billed separately, and preventive maintenance belongs to a service agreement rather than to the monitoring plan. Our business security and alarm work is commercial only.
Intercom and Door Entry
Intercom answers who is at the door before you let them in. In practice it is how a building with a locked front door still receives deliveries, visitors and service calls without someone walking to the door every time. It is usually the cheapest of the four to add and the one most often retrofitted after access control is already in.
What Holds It All Up
Cabling and Network Are Part of the Security System
Nearly every device above now runs over the same network cable, powered over that cable from a switch. That makes structured cabling and the switching behind it a security decision. Cameras on a flat network with office traffic cause problems for both. Insufficient switch power budget means cameras that reboot when the heaters come on in winter. Undocumented cable means every future service call starts with an hour of tracing.
We pull and certify cable, label both ends, hand over as-builts, and keep camera, access and office traffic separated. Our network work exists mostly because security systems kept being installed onto networks that could not carry them.
Commercial AV Shares the Same Infrastructure
Paging, sound masking, conference rooms and video walls run on the same cable plant and often the same switches. If AV is anywhere in your plan, it is worth scoping alongside security rather than after, because the two compete for the same pathways, rack space and power. See commercial AV.
Taking Over a System Someone Else Installed
You do not have to start over. We take over and service systems other companies installed, which usually begins with an audit of what is actually there, what is still supported, and what has to be replaced before anything can be added. That is often the cheapest route to a working system for a business that inherited one with a building.
Related Questions
Can these systems be bought separately and still work together?
Yes, and most buildings end up that way. The practical requirement is that whoever designs each one knows what the others need: shared cable pathways, enough switch ports and power budget, a single credential strategy so staff are not carrying a badge and a fob, and door hardware that suits both the access control and the fire egress rules for the building. Buying them separately over several years works. Buying them separately from people who never see each other’s drawings is where it gets expensive.
Which system should a small commercial building start with?
Start with whichever one is costing you money now. If you are rekeying doors or cannot say who has after-hours access, start with access control. If you are absorbing shrinkage, damage claims or disputes you cannot settle, start with cameras. If the building sits empty overnight and nobody would be told, start with a monitored alarm. Whatever you start with, have the cabling scoped for all of it, because that is the part that is painful to revisit.