| System Availability | Target at least 99.9% annual availability for business-critical entrances. | A failed intercom can delay visitors, deliveries, emergency access, and resident support. | Request historical uptime records, maintenance procedures, and failover documentation. |
| Network Resilience | Support Power over Ethernet, VLAN separation, traffic prioritization, and offline operation for essential local functions. | The system should continue operating safely during temporary network or cloud-service interruptions. | Test operation during internet loss, switch restart, and power recovery. |
| Video and Audio Quality | Use at least 1080p video, wide dynamic range, echo cancellation, and low-light support where required. | Clear identity verification depends on readable images and understandable two-way audio. | Evaluate faces, badges, and speech at the actual mounting distance and lighting conditions. |
| Cybersecurity | Require encrypted communications, unique credentials, role-based access, secure update procedures, and audit logs. | An intercom is a connected access device and can expose entry points, video, and personal information. | Review security documentation, penetration-test summaries, vulnerability response times, and update history. |
| Privacy Controls | Provide configurable retention, data deletion, access logs, privacy masking, and region-appropriate data storage. | Video, visitor records, and call histories may contain identifiable personal data. | Confirm storage locations, retention settings, administrator permissions, and export/delete functions. |
| Access-Control Integration | Support standards-based interfaces such as SIP, ONVIF, REST APIs, or documented relay and reader connections. | Open integration reduces dependence on one platform and simplifies future upgrades. | Request integration guides and conduct a live test with the existing access-control system. |
| Scalability | Select a platform that supports the current site plus projected growth for doors, users, cameras, and locations. | Replacing a system because of capacity limits is usually more disruptive and expensive than planning for growth. | Confirm maximum endpoints, concurrent calls, administrators, sites, and licensing requirements. |
| Administrative Efficiency | Centralized device management, templates, bulk configuration, health monitoring, and remote diagnostics. | Efficient administration lowers recurring labor costs across multiple entrances or sites. | Measure the time required to add a user, change permissions, update devices, and review alerts. |
| Environmental Durability | For exposed entrances, consider weather resistance, impact resistance, operating temperature, and corrosion protection. | Outdoor equipment faces rain, dust, sunlight, temperature changes, and physical contact. | Check published ingress and impact ratings and compare them with the installation environment. |
| Power Continuity | Use protected switching and backup power sized for the intercom, network equipment, locks, and required operating period. | A video intercom may remain available while the electric lock or network fails unless the entire power path is protected. | Calculate load requirements and test controlled shutdown, battery operation, and recovery behavior. |
| Total Cost of Ownership | Evaluate a five-year total including hardware, installation, licenses, cloud services, support, power, maintenance, and replacement parts. | The lowest purchase price may result in higher subscription, labor, integration, or replacement costs. | Use a five-year cost model and include expansion, warranty, training, and software renewal assumptions. |
| Support and Lifecycle | Prefer documented support periods, spare-parts availability, service-level targets, and a published end-of-life policy. | Long-term support protects the investment and reduces the risk of forced replacement. | Review warranty terms, response targets, firmware support duration, and replacement procedures. |