PoE vs Wi-Fi Video Intercom: MDU Connection Guide

PoE (Power over Ethernet) video intercoms receive power and data over a Cat5e/Cat6 cable from a PoE switch. Wi-Fi intercoms connect wirelessly to the building's network and require a separate power source. PoE usually offers a more predictable wired path; Wi-Fi can simplify a retrofit where a new data run is not available. Select the route after reviewing the existing cable, signal, power and acceptance requirements.

It depends on existing infrastructure. If Cat6 cabling already runs to the lobby entrance, PoE may reduce new cable work. If new cabling must be run, the labour and reinstatement scope must be measured. Wi-Fi avoids a new data run but requires a stable access point at the entrance. Confirm the model, site survey and written quotation before comparing PoE and Wi-Fi.

Wi-Fi reliability for lobby door stations depends on signal strength and network stability at the entrance location. Lobbies with thick concrete or metal-framed walls, or distant from the nearest access point, may experience intermittent connectivity causing missed calls or video dropouts. A dedicated Wi-Fi access point within 10 metres of the door station, on a 5GHz band with low interference, provides acceptable reliability for most MDU deployments. For high-traffic buildings or where missed door calls are unacceptable, PoE is the lower-risk choice. Always perform a Wi-Fi site survey at the entrance location before specifying Wi-Fi intercom.

They can connect when the selected panels and the named NVR/VMS expose the required video, authentication and event functions. Request an ONVIF connection review for each model and firmware, then test discovery, stream, events and door-release handling on the target system. PoE and Wi-Fi are network paths; they do not by themselves prove connection.

Most video intercom door stations require IEEE 802.3af (PoE, 15.4W maximum) or IEEE 802.3at (PoE+, 30W maximum). Standard 1080P door stations with IR night vision typically draw 7–12W and are compatible with 802.3af switches. Door stations with built-in heating elements for extreme cold environments (-40°C operation) may draw 15–25W and require 802.3at or 802.3bt ports. Verify the door station's power draw specification against your switch's per-port PoE budget before purchasing — undersized PoE supply causes intermittent reboots and video dropouts.

Modern MDU video intercoms may use a dedicated indoor monitor, a smartphone path or a SIP endpoint. Confirm which call-delivery method is available on the selected model, what the project network requires and whether remote door release is in scope. A named Asterisk, 3CX or other PBX connection can be reviewed when SIP 2.0 is required.

Hardware lifespan is similar — 7–10 years for quality door stations in protected lobby environments, shorter for exposed outdoor installations. Maintenance differences are primarily in troubleshooting: PoE faults are easier to diagnose (check cable continuity, PoE switch port status, power draw) and typically have a single point of failure per door station. Wi-Fi faults involve more variables (signal strength, channel interference, DHCP lease, AP firmware) and can be intermittent and harder to reproduce. For property managers without dedicated IT staff, PoE's simpler fault diagnosis is a practical operational advantage.