| Video Resolution | 1920 × 1080 pixels | Full HD resolution provides approximately 2.07 million pixels per frame for visitor identification. | Confirm that 1080p is available at the selected frame rate, not only in a low-frame-rate mode. |
| Compression Standard | H.264 and preferably H.265 | H.264 offers broad compatibility. H.265 can deliver similar visual quality at a lower bitrate, but requires compatible decoding equipment or software. | Check whether H.265 is supported by the indoor monitor, recorder, mobile application, and viewing platform. |
| Frame Rate | 25–30 frames per second at 1080p | 30 fps produces smoother motion and reduces blur during quick movement. Regional power-frequency settings may affect available frame-rate options. | Verify 30 fps at full 1920 × 1080 resolution with the desired compression and image settings. |
| Typical Video Bitrate | H.264: approximately 2–6 Mbps H.265: approximately 1–4 Mbps | Actual bitrate varies with lighting, scene movement, codec profile, frame rate, and image complexity. These ranges are practical planning estimates for 1080p door scenes. | Use the maximum configured bitrate when sizing network capacity and storage. |
| ONVIF Interoperability | ONVIF Profile S and/or Profile T | Profile S is commonly associated with basic IP video streaming and configuration. Profile T supports advanced video streaming functions, including modern codec and imaging features. | Request the exact ONVIF profile and test live view, two-way audio, events, and stream discovery with the intended system. |
| ONVIF Event Support | Motion, doorbell, tamper, and digital input events | Event support allows compatible software or recorders to respond to a call, motion trigger, door contact, or tampering condition. | Confirm which events are exposed through ONVIF and which are available only in the device’s proprietary application. |
| Two-Way Audio | Full-duplex or echo-cancelled communication | Full-duplex audio allows both parties to speak naturally. Acoustic echo cancellation improves clarity when the microphone and speaker are close together. | Test audio in noisy outdoor conditions and verify that talk mode works through the indoor unit and mobile client. |
| Night Performance | Infrared or white-light assistance with low-light exposure control | Night illumination and wide dynamic range help preserve facial detail when the visitor is backlit or the entrance is poorly lit. | Check night samples at the actual mounting distance and look for overexposure from reflective surfaces. |
| Network Interface | 10/100 Mbps Ethernet; PoE preferred where applicable | A 100 Mbps wired link provides ample capacity for a single 1080p stream and generally offers more stable latency than a congested wireless connection. | Confirm the supported PoE standard, power budget, cable distance, and whether a separate power supply is required. |
| Storage Planning | Approximately 21.6–64.8 GB per day per continuous stream | The estimate is based on roughly 2–6 Mbps using the formula: bitrate × 86,400 seconds ÷ 8. Motion recording can reduce actual storage use substantially. | Calculate storage using the configured bitrate, recording schedule, retention period, and number of cameras. |
| Latency | Preferably below 500 ms on a local network | Lower delay makes conversations and remote door release more natural. Internet routing and mobile networks can add variable delay. | Measure response time during local and remote tests, including call notification and door-release commands. |
| Regional Video Mode | 50 Hz and 60 Hz settings | Selectable regional modes help minimize flicker from artificial lighting and support different electrical-frequency environments. | Choose the correct 50 Hz or 60 Hz mode for the installation country and indoor lighting. |
| Best Overall Specification | 1080p at 30 fps, H.264/H.265, ONVIF Profile S or T, wired Ethernet, and reliable two-way audio | This combination balances image clarity, smooth motion, compatibility, bandwidth efficiency, and long-term integration flexibility for international installations. | Prioritize verified interoperability and real installation testing over headline resolution alone. |