Improving Building Security the Right Way: A Consumer's Guide to Door Buzzer Systems and Access Control
- Mar 25
- 5 min read
In today’s world, building security is essential. Whether you manage a residential property in Philadelphia, a small business in Havertown, or a large commercial facility in King of Prussia, choosing the right access control system can mean the difference between peace of mind and costly vulnerabilities.
One of the most common mistakes people make when upgrading security is unintentionally downgrading the integrity of their building. Adding a door buzzer or intercom might seem like an upgrade, especially when it comes to convenience and comfort. However, if your system is not designed or installed correctly, it can actually create new entry points for unauthorized access.
This guide will walk you through how to improve building security the right way, with a focus on door buzzer systems, intercoms, and access control solutions, so you can make informed decisions that truly protect your property.
What We’ll Cover
Understanding Access Control Systems
At its core, an access control system manages who can enter your building and when. Most systems include three primary components:
Electric Lock
Electric strike or magnetic lock (maglock)
Authorized Access Methods
Keypads (PIN codes)
Key fobs or cards
Mobile apps or cloud-based credentials
Visitor Communication (Optional)
Intercom or door buzzer system
These elements work together to control entry while maintaining convenience for tenants, employees, visitors, and vendors.
However, simply installing these components isn’t enough. The key is ensuring they are integrated properly and aligned with your building’s security needs.
Step 1: Evaluate Your Current Security
Before installing or upgrading any system, you need to understand what you’re working with.
Ask yourself:
Where are your current entry points?
Are doors consistently locked and monitored?
Are there blind spots or unsecured areas?
Have there been past security incidents, such as package theft or vandalism?
Do you have a strong door that latches securely, or is your door flimsy and easily breached?
The goal is simple: identify vulnerabilities and fix them, without introducing new ones.
For example, adding an intercom system without securing the door hardware can actually make it easier for someone to gain entry.
Levels of Access Control: Not All Systems Are Equal
One of the most important concepts in building security is that there are different levels of access control.
1. Basic Intercom or Door Buzzer Systems
These systems allow visitors to request entry and occupants to unlock the door remotely.
Features may include:
Call buttons or directories
Audio/video communication
Basic unlock functionality
Limitations:
Minimal or no audit logs
Limited user permissions
Little protection against tampering
In some cases, individuals familiar with the system can manipulate or “fiddle with” the hardware to trigger an unlock. The property owner, in an attempt to increase security and convenience by installing a new intercom system, has inadvertently introduced a new vulnerability.
2. Mid-Level Systems with Access Control Features
These systems expand on basic intercom functionality by adding:
Entry logs and audit trails
User-specific access levels
Scheduled access times
Multiple credential types (fobs, apps, codes)
They offer a better balance of convenience and security, making them ideal for small to mid-sized properties.
3. Advanced Access Control Systems
High-security environments require robust systems with built-in safeguards.
Features include:
Redundant hardware and fail-safes
Security relays that isolate unlocking mechanisms
Centralized management and monitoring
These systems are designed to prevent tampering and resist forced entry attempts, even if someone tries to damage the intercom or keypad.
Matching the System to the Risk Level
Not every building needs enterprise-grade security, but every building needs appropriate security.
Consider this comparison:
Multi-tenant residential building:
If someone gains access to the lobby or atrium, the likely risk is package theft or minor trespassing.
Corporate office with sensitive data:
Unauthorized access could lead to data breaches, theft of intellectual property, or major financial losses.
The higher the stakes, the more important it is to invest in advanced access control systems with layered protections.
Common Weaknesses in Door Buzzer Systems
Door buzzer and intercom systems are often the weakest link in building security.
1. Physical Tampering
Some systems allow access if wires are exposed or components are manipulated.
Solution:
Use systems with security relays or protected wiring that prevent direct unlocking from the exterior unit.
2. Predictable or Shared Access Codes
Keypad systems can be compromised if users share codes or choose simple PINs.
Solution:
Assign unique credentials
Regularly update codes
Opt for a keypad with built-in card reader, so that you can utilize fobs or clamshell cards, which are harder to share
3. Lack of Monitoring
Without logs or alerts, unauthorized access may go unnoticed.
Solution:
Choose systems with activity tracking and reporting features.
Choosing the Right Electric Lock
Your access control system is only as strong as the lock it controls.
Electric Strikes
Installed inside the door frame
Works with traditional locksets
Typically more secure against forced entry
Magnetic Locks (Maglocks)
Use electromagnetism to secure the door
More expensive installation, requiring extra hardware for code and safety compliance
More easily breached, especially if the door is weak
May be the best option based on the door type
Important Consideration:
Maglocks usually fail safe during power outages, meaning the door unlocks automatically when power is lost.
Planning for Power Outages
Power loss is one of the most overlooked vulnerabilities in access control systems.
Key Questions:
Does your system fail safe or fail secure?
What happens during extended outages?
For many business environments, an unlocked door during a power outage is unacceptable.
Solutions:
Install backup batteries to maintain lock function
Regularly test and maintain backup systems
Replace batteries according to manufacturer guidelines
A backup system is only effective if it actually works when needed.
Adding Layers of Security
Strong security is never based on a single component—it’s built in layers.
1. Secondary Locks
Use a mechanical deadbolt during off-hours.
Keeps the building secure when electronic systems are inactive
Adds a physical barrier against forced entry
2. Time-Based Access
Restrict access to certain hours to reduce risk.
3. Multi-Factor Authentication
Combine credentials (e.g., fob + PIN) for higher security areas.
4. Surveillance Integration
Pair access control with cameras for visibility and accountability.
Best Practices for Long-Term Security
Installing a system is just the beginning. To maintain security over time:
Regularly audit access permissions
Update software and firmware
Test locks and backup systems
Train users on proper system use
Work with experienced security professionals
Neglecting maintenance can turn even the most advanced system into a liability.
Final Thoughts: Security Done Right
Upgrading your building’s security requires more than just installing a door buzzer or intercom. It starts with understanding your current vulnerabilities and choosing a system that aligns with your property’s risk level.
The right door buzzer or access control system should:
Address your building’s specific vulnerabilities
Match the level of risk
Prevent tampering and unauthorized entry
Continue working during power outages
Provide flexibility without sacrificing security
Most importantly, it should enhance your security, not weaken it.
Basic systems may be sufficient for low-risk environments, but higher-security properties demand advanced access control with built-in protections against tampering and failure. Choosing the right electric lock, planning for power outages, and adding layers like backup batteries and secondary locks are all critical steps.
By taking a thoughtful, informed approach, you can build a system that not only controls access, but truly protects what matters most.
Do you need to upgrade your building's security, but you are not sure where to start? Call us today to schedule a free consultation.
Want to Learn More About Improving Security for Your Philadelphia Business?
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