Security Camera Buying Guides & Resources

Can Multiple PoE Switches Work With One NVR? A Scaling Guide

Can Multiple PoE Switches Work With One NVR? A Scaling Guide

Author: BiJianxin
Published: September 19, 2026
Yes. Multiple switches can feed one NVR when the camera networks are routable, uplinks are sized for aggregate traffic, and the recorder still has channel.
Best Camera Placement for Commercial Building Entrances and Lobbies

Best Camera Placement for Commercial Building Entrances and Lobbies

Author: BiJianxin
Published: September 18, 2026
Place commercial entrance cameras for usable face angles, lobby context, backlight control, access-event review, tamper protection, and clean interior handoff.
How to Replace One IP Camera Without Replacing the Entire NVR

How to Replace One IP Camera Without Replacing the Entire NVR

Author: BiJianxin
Published: September 17, 2026
Match network method, power, resolution support, codec, authentication, and protocol before choosing the replacement. Bench-test recording, events, time sync.
How to Design a 32-Camera Commercial Surveillance System That Can Grow

How to Design a 32-Camera Commercial Surveillance System That Can Grow

Author: BiJianxin
Published: September 16, 2026
At thirty-two cameras, topology and operations become as important as image quality. Divide the property into zones, aggregate switches deliberately for buyers.
What Incoming Bandwidth Means on an NVR for IP Cameras Before Buying

What Incoming Bandwidth Means on an NVR for IP Cameras Before Buying

Author: BiJianxin
Published: September 15, 2026
Incoming bandwidth is the recorder’s allowance for camera streams arriving at the NVR. Add the configured main-stream bitrates, include overhead and spikes.
SFP vs RJ45 Uplink for PoE Camera Switches: Which Should You Use?

SFP vs RJ45 Uplink for PoE Camera Switches: Which Should You Use?

Author: BiJianxin
Published: September 14, 2026
Use RJ45 for short copper runs inside a room or nearby rack. Use an SFP fiber path for longer building links, electrical isolation, outdoor transitions, or.
PoE vs PoE+ vs PoE++ for Security Cameras: A Buyer’s Power Guide

PoE vs PoE+ vs PoE++ for Security Cameras: A Buyer’s Power Guide

Author: BiJianxin
Published: September 13, 2026
Choose the power class from each device’s maximum draw, not from camera resolution. Standard fixed cameras often fit af or at; heaters, illuminators for buyers.
When Should You Upgrade a Security Camera NVR? Seven Buying Signals

When Should You Upgrade a Security Camera NVR? Seven Buying Signals

Author: BiJianxin
Published: September 12, 2026
Upgrade when the recorder blocks a required outcome: unsupported cameras, insufficient channels or bandwidth, inadequate retention, failing drives, slow.
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