Quick Navigation

• What Is a Video Door Phone System?
• How Does a Video Door Phone System Work?
• Why Apartment Buildings Need Video Door Phone Systems
• Analog vs. IP Video Intercom: What’s the Difference?
• Key Features to Look for in an Apartment Video Door Phone
• Video Door Phone vs. Smart Doorbell: What’s the Difference?
• FARHD: A Trusted Video Door Phone Manufacturer

What Is a Video Door Phone System?

A video door phone system—also known as a video intercom, video door entry system, or apartment intercom system—is an entry communication system that lets residents see and speak with visitors before granting them access.

Think of it as a video calling bell: visitors ring the doorbell at the building entrance, and residents can view them on a monitor inside their apartment—or on their smartphone—without opening the door. This gives residents the power to decide who gets in and who doesn’t.

A video door phone system typically consists of three core components:

Component	Description
Outdoor Door Station	Installed at the building entrance with a camera, microphone, speaker, and call buttons (or keypad). May also include a card/fob reader or QR code scanner.
Indoor Monitor	A wall-mounted display (typically 4–10 inches) installed inside each apartment. Usually touchscreen, allowing residents to see, talk, and unlock the door.
Mobile App	Allows residents to answer calls, view visitors, and unlock doors from anywhere using a smartphone.

💡 Key distinction: A video door phone is not just a doorbell with a camera. The best systems integrate into a building’s entire access control strategy.

How Does a Video Door Phone System Work?

Here’s a step-by-step breakdown of how a video door phone system operates in an apartment building:

Step 1: Visitor Arrives at the Entrance

A visitor approaches the building entrance and locates the resident’s name or unit number on the outdoor door station’s directory. They press the corresponding call button.

Step 2: Call Is Placed to the Resident

The door station sends a call to the resident’s indoor monitor and/or smartphone app. In IP-based systems, this call travels over the building’s network and the internet.

Step 3: Resident Answers and Sees the Visitor

The resident’s indoor monitor rings and the screen lights up, displaying a live HD video feed from the door station’s camera. The resident can see and hear the visitor clearly.

Step 4: Two-Way Communication

The resident can talk to the visitor through the monitor’s built-in microphone and speaker. This two-way audio and video communication lets residents verify the visitor’s identity before making any decisions.

Step 5: Door Unlocking

If the resident decides to grant access, they can unlock the door with a simple touch on the monitor screen or a tap on their smartphone app. The door release mechanism is triggered electronically.

Step 6: Remote Access (Optional)

With IP-based systems and mobile apps, residents can perform all these steps—answer calls, see visitors, talk, and unlock doors—from anywhere in the world, as long as they have an internet connection.

📱 Remote access in action: A courier arrives while you’re at work. Your phone rings, you see the delivery person on video, and you unlock the building door with one tap—all without leaving your desk.

Why Apartment Buildings Need Video Door Phone Systems

Video door phone systems have become essential for modern multifamily buildings. Here’s why:

1. Enhanced Security Through Visual Verification

With a video intercom, residents can visually confirm who’s at the door before letting anyone in. Delivery drivers, contractors, friends—no one slips in unnoticed. This cuts down unauthorized access and reduces risk for everyone in the building.

A camera at every perimeter door is more than just a tool—it’s a deterrent. Intruders looking to sneak in realize their every move will be captured and logged.

2. Convenience and Remote Access

Modern video door phone systems let residents manage visitor access from their smartphones. No more chasing property staff, no more bottlenecks at the front desk. Residents love the independence; staff love the freedom.

3. Property Staff Efficiency

Think about how much time property staff waste handling visitor access. A video intercom flips that script—residents handle their own visitor management. Staff get their time back to focus on bigger issues.

4. Evidence and Audit Trails

Video intercom systems log every access event: who buzzed, when, and what was said. This footage is powerful leverage in disputes or investigations.

5. Scalability for Large Buildings

IP-based systems can support hundreds or even thousands of indoor stations. For example, one leading solution supports up to 500 indoor stations per building, with multiple door stations installed for one building. In practice, you can connect dozens of residential buildings in one complex into a single network serving thousands of residents.

Analog vs. IP Video Intercom: What’s the Difference?

When choosing a video door phone system for an apartment building, one of the first decisions is whether to go with analog or IP (Internet Protocol) technology.

Feature	Analog System	IP System
Connectivity	Uses dedicated multi-conductor wiring	Uses building network (Ethernet/Wi-Fi)
Mobile App Access	Not available	Yes—answer calls and unlock from anywhere
Scalability	Limited (typically up to 4 doors)	Highly scalable—add entrances or entire buildings easily
Remote Management	No	Yes—cloud-based control
Integration	Limited	Works with access control, elevators, gates, CCTV
Upfront Cost	Lower	Higher
Long-Term Value	Limited features	Stronger long-term value

When to Choose Each

Choose analog if:

• You have a small building with few units
• You want simple, reliable functionality without internet dependency
• Budget is the primary concern
• You don’t need mobile app access

Choose IP if:

• You have a multifamily building with multiple units
• Residents expect modern amenities like smartphone access
• You want remote access and mobile app functionality
• You plan to expand or integrate with other systems
• You want future-proof technology

📊 Market trend: The global door phone market is projected to grow from USD 6.05 billion in 2025 to USD 9.24 billion by 2031, driven largely by demand from multifamily residential buildings.

Key Features to Look for in an Apartment Video Door Phone

When evaluating video door phone systems for an apartment building, consider these essential features:

✅ HD Video Quality

High-definition video ensures clear visuals, even in low-light conditions or with strong backlight.

✅ Two-Way Audio

Clear, noise-canceling audio for effective communication with visitors.

✅ Mobile App Integration

Residents should be able to answer calls, view video feeds, and unlock doors from their smartphones.

✅ Multiple Door Station Support

For buildings with multiple entrances, the system should support multiple outdoor stations.

✅ Scalability

The system should support adding new units or buildings without requiring extensive rewiring.

✅ Integration Capabilities

Look for compatibility with access control systems, elevators, gates, and CCTV cameras.

✅ Remote Unlocking

Residents and property managers should be able to unlock doors remotely.

✅ Visitor Logs

Audit trails showing who entered, when, and how.

Video Door Phone vs. Smart Doorbell: What’s the Difference?

While often used interchangeably, these terms refer to different products:

Aspect	Video Door Phone	Smart Doorbell
Typical Use	Apartment buildings, multifamily properties	Single-family homes
System Scale	Supports multiple units and indoor stations	Typically supports one household
Indoor Hardware	Wall-mounted monitor in each apartment	Usually uses existing doorbell wiring + smartphone
Visitor Directory	Yes—call by name or unit number	No—single call button
Integration	Building-wide access control	Home automation

Bottom line: Video door phones are built for multifamily buildings with multiple residents. Smart doorbells are designed for single-family homes.

FARHD: A Trusted Video Door Phone Manufacturer

Founded in 1998, FARHD is a leading Chinese manufacturer of video door phones and intercom systems with over 28 years of industry experience.

What Makes FARHD Different?

One-Stop Solution: FARHD specializes in the full in-house R&D and production of everything from TFT LCD screens, driver boards, and camera modules to complete villa and apartment building intercom systems. As one of the few companies capable of providing a one-stop overall solution—from core components to complete systems—they ensure seamless integration and quality control at every stage.

Extensive Product Line:

• Wireless video doorbells
• 4-wire CVBS and AHD video doorbells
• 2-wire IP systems for villas and apartments
• IP-based systems for villas and apartments
• Audio intercom systems

Global Reach: FARHD provides SKD semi-knocked-down solutions to assembly factories across Europe, the Middle East, South America, Southeast Asia, the United States, Russia, India, Iran, Turkey, South Korea, and Italy—effectively reducing both production and tariff costs for partners.

Certifications: Products hold international certifications including CE, FCC, RoHS, IP65 water resistance, and EMC.

Proven Track Record: Supported by 28 direct sales branches across China, FARHD has successfully completed over 10,000 large-scale building video intercom projects, including ultra-large communities with 1,000, 3,000, and even over 5,000 households.

OEM/ODM Services: FARHD offers comprehensive customization including software and hardware development, UI design, functional module adjustments, and tailored packaging solutions.

After-Sales Support: A dedicated technical support group is established upon product delivery to assist with programming, device installation, and wiring connections throughout the process.

Scale: FARHD serves over 1,000 enterprises worldwide with an annual sales volume of 300,000 units.

Frequently Asked Questions

Can a video door phone system be installed in an existing apartment building?

Yes. IP-based systems can be retrofitted into existing buildings using the building’s network infrastructure. Some systems can even use existing 2-wire cabling.

How many indoor stations can an apartment video intercom system support?

IP-based systems can support hundreds or even thousands of indoor stations. One leading solution supports up to 500 indoor stations per building.

Can residents unlock doors from their smartphones?

Yes. Modern IP video door phone systems include mobile apps that let residents answer calls, see visitors, and unlock doors from anywhere.

What’s the difference between a video door phone and an audio-only intercom?

A video door phone adds visual verification—residents can see who’s at the door before deciding to grant access. Audio-only systems lack this crucial security feature.

How much does an apartment video intercom system cost?

Costs vary widely based on building size and system complexity. Commercial video intercom systems typically range from $1,500 to $5,000 per entry door, with full-building systems for multi-tenant properties ranging from $10,000 to $50,000+.

Conclusion

A video door phone system is an essential security and convenience upgrade for any multifamily building. By allowing residents to see, speak with, and remotely unlock doors for visitors, these systems enhance security, streamline property operations, and improve the resident experience.

Whether you’re retrofitting an existing building or planning a new development, choosing the right system—whether analog or IP—depends on your building’s size, budget, and resident expectations. With the global door phone market growing rapidly, investing in a modern video intercom system is not just a security upgrade—it’s a strategic decision that adds value to your property.

Ready to upgrade your apartment building’s entry system? Contact FARHD for a customized video door phone solution tailored to your property’s needs.