| 1 | Video Resolution | 1920 × 1080 pixels, commonly referred to as Full HD or 1080p. The image contains approximately 2.07 million pixels per frame. | Provides clearer facial details, visitor identification, and evidence quality than standard-definition video. | Full HD raster resolution |
| 2 | Video Compression | H.264 is widely used for compatibility. H.265/HEVC can reduce bitrate requirements compared with H.264 at similar visual quality. | Affects network bandwidth, storage capacity, remote viewing performance, and compatibility with recording equipment. | ITU-T H.264 and H.265 standards |
| 3 | Camera Viewing Angle | A horizontal field of view of approximately 100° to 170° is commonly available, depending on lens design and mounting position. | A wider angle can cover more of the entrance area, but excessive wide-angle distortion may reduce edge image clarity. | Lens field-of-view specification |
| 4 | Low-Light Performance | Typical outdoor units use infrared illumination, often with an automatic day/night switching function. Effective infrared distance varies by enclosure and lens design. | Supports visitor identification at night and in poorly lit corridors, gates, and building entrances. | Infrared illumination and day/night imaging functions |
| 5 | Weather and Dust Protection | Outdoor door stations may be specified with ratings such as IP54, IP65, or IP66. IP65 indicates dust-tight protection and protection against water jets. | The enclosure rating should match the installation environment, including rain exposure, dust, and outdoor temperature changes. | IEC 60529 IP Code |
| 6 | Power Options | Common architectures include low-voltage DC power, two-wire bus systems, and Ethernet-based power. PoE installations may use IEEE 802.3af or higher power classes when supported. | Power architecture affects cabling cost, installation complexity, backup-power planning, and system expansion. | IEEE 802.3af/at PoE specifications |
| 7 | Audio Communication | Full-duplex hands-free communication is commonly used, with microphone and speaker acoustically designed for entrance environments. | Echo cancellation and noise reduction help maintain intelligible conversations near roads, elevators, and busy entrances. | Two-way voice communication design |
| 8 | Access-Control Interfaces | Typical interfaces may include an electric-lock relay, exit-button input, door-position input, alarm input, and request-to-exit control. | Determines compatibility with electric strikes, electromagnetic locks, gate operators, exit sensors, and building access systems. | Low-voltage access-control interface requirements |
| 9 | Operating Environment | Outdoor equipment is commonly designed for a temperature range around -20°C to 60°C, although the exact range must be confirmed for each model. | The specified operating range should cover the installation site's seasonal temperature, humidity, and direct-sun exposure. | Manufacturer environmental test specifications |
| 10 | Quality and Compliance Documentation | Professional suppliers should be able to provide technical datasheets, wiring diagrams, firmware information, test reports, and applicable market-compliance documents. | Documentation supports system integration, import procedures, installation training, after-sales service, and project acceptance. | Applicable regional product and EMC requirements |