technical knowledge

30 2026-07

Six ways to deal with camera backlight installation

When encountering strong backlight environments such as glass curtain walls, doors, windows, and garage entrances and exits, we provide prac...

193  ·  2026-07-30 28 2026-07

Special requirements for camera installation in elevators

The elevator shaft has a special environment: small space, strong electrical interference, and restrictions on accompanying cables. Explain...

222  ·  2026-07-28 26 2026-07

Outdoor camera protection level IP66 / IP67 and lightning protection grounding points

Understand the meaning of IP protection level, explain the waterproof installation details of outdoor equipment and three-level lightning pr...

251  ·  2026-07-26 24 2026-07

Selection of monitoring poles and key points in foundation construction

From height, wall thickness, cantilever arm to foundation size and embedded parts, the engineering basis for pole selection and common safet...

280  ·  2026-07-24 22 2026-07

PoE power supply distance and network cable selection points

Explain the PoE standard, the origin of the 100-meter limit, the over-distance solution, and the actual impact of network cable materials on...

309  ·  2026-07-22 20 2026-07

Monitoring cable laying specifications: separation of strong and weak electricity and anti-interference

Explain the requirements for spacing between strong and weak electricity, methods for bridges and pipelines, grounding and shielding treatme...

340  ·  2026-07-20 18 2026-07

Application of wireless bridge in long-distance monitoring

Explain the applicable scenarios, frequency band selection, visual condition requirements and bandwidth planning of wireless bridges, as wel...

367  ·  2026-07-18 16 2026-07

Monitor SMR and CMR of hard disk: Why choose CMR for monitoring projects

Explain the differences between shingled (SMR) and vertical (CMR) recording technologies, and illustrate the risks of SMR hard drives in con...

396  ·  2026-07-16 14 2026-07

The relationship between the number of NVR access channels and bandwidth: how to calculate access capability

The nominal number of NVR channels is not equal to the actual number of available channels, indicating the triple constraints of access band...

423  ·  2026-07-14 12 2026-07

Application and selection of RAID in monitoring storage

Compare the applicability of RAID 0/1/5/6/10 in monitoring scenarios, explain why RAID5 is commonly used in monitoring projects and the risk...

452  ·  2026-07-12 10 2026-07

Planning and tiered storage strategy for video storage days

Combining compliance requirements and costs, explain how to set the number of storage days by region, as well as regular archiving and capac...

123  ·  2026-07-10 08 2026-07

What is ANR re-recording after network disconnection? How to ensure complete video recording in weak network scenarios

This article introduces the working principle and deployment key points of ANR, and explains the value of front-end SD card storage in unsta...

150  ·  2026-07-08