| Door and lock compatibility | Lock type, voltage, current draw, and whether the system provides a compatible relay output | Confirm the lock’s electrical requirements and whether it is fail-safe or fail-secure. Use an appropriately rated power supply and relay; do not assume the keypad can power the lock directly. | An electrical mismatch can prevent reliable unlocking or damage equipment. Fail-safe locks unlock when power is lost; fail-secure locks remain locked from the secure side, subject to applicable life-safety requirements. |
| Existing wiring | Available cable routes, conductor count, cable condition, and distance from the entry panel to indoor equipment | Check the installation manual for supported cable types and maximum distances. Network video systems may require Ethernet, while other systems use dedicated wiring; existing doorbell wiring may not be suitable. | Wiring requirements vary by system. Verifying the route and cable before purchase helps avoid unexpected construction or additional equipment. |
| Network and connectivity | Whether the system is standalone, network-connected, or cloud-connected; Ethernet or Wi-Fi availability | For network models, verify coverage at the entrance, network requirements, and whether remote access depends on internet service or a subscription. A wired Ethernet connection can provide a more consistent link where available. | Connectivity affects video access, notifications, remote answering, and software updates. Core entry functions may differ when the network or internet connection is unavailable. |
| Power requirements | Required supply voltage and current, power for the lock, and backup-power options | Check the specifications for the panel, monitor, network equipment, and electric lock separately. If backup operation is important, confirm which components remain powered during an outage. | Video equipment and locks can have different power needs. A backup supply for one component does not necessarily keep the entire entry system working. |
| Keypad credentials | PIN length, number of users or codes, temporary-code support, and code-management method | Choose a model that supports the number of residents and authorized users. Prefer unique codes where possible, and confirm that codes can be changed or revoked without replacing the hardware. | Shared or unchanged codes are harder to manage. Individual or temporary codes can make it easier to remove access when a resident, worker, or visitor no longer needs it. |
| Video and viewing angle | Camera field of view, image quality, low-light performance, and indoor viewing options | Check the camera’s stated viewing angle and test whether it can capture a visitor’s face at the installed height and distance. Review night-vision or low-light details for entrances with limited lighting. | A wide field of view can cover more of an entrance, but camera position and lighting also affect identification. Published resolution alone does not guarantee a clear image in every setting. |
| Security and privacy | Administrative access controls, software updates, data storage, and remote-access protections | Look for a way to change default credentials, restrict administrator access, and receive security updates. Review whether video is stored locally or remotely, how long it is retained, and who can access it. | Video and entry logs can contain sensitive information. Clear access controls and a suitable storage policy help reduce unnecessary exposure. |
| Weather and placement | Outdoor operating conditions, water and dust protection rating, sun exposure, and mounting surface | Check the manufacturer’s environmental ratings and temperature limits against the installation location. Use a suitable mounting position and follow sealing instructions for exposed wiring and fixings. | An indoor-rated device may not withstand rain, dust, or temperature extremes. Exposure and poor mounting can shorten service life or cause unreliable operation. |
| Building and user needs | Number of entrances, residents, indoor stations, accessibility needs, and visitor-handling process | Confirm support for the required number of doors and indoor endpoints. Consider keypad visibility, usable button spacing, audible or visual feedback, and an alternative entry method for authorized users. | A system that fits the building and its users is easier to operate. Multi-unit properties may also need separate credentials and clear administration responsibilities. |
| Installation and compliance | Mounting work, lock wiring, local electrical and fire-safety rules, and permission to modify shared property | Review the installation instructions before purchasing. Consult a qualified installer when work involves mains wiring, access-control locks, fire exits, or shared building systems; obtain required property approval. | Access-control work can affect safe egress and shared infrastructure. Requirements depend on the building and local rules, so installation should not obstruct emergency exit routes. |
| Ongoing costs and support | Subscription fees, cloud-storage limits, warranty, replacement parts, and update policy | Check which features work without a subscription and whether recordings, remote access, or notifications require a paid plan. Review warranty terms and the availability of support and replacement components. | The purchase price may not reflect the full cost of ownership. Understanding recurring fees and support arrangements helps avoid losing important features later. |