Aiphone GT-DMB-N 3-IN-1 Video Entrance Station with NFC Reader
The Aiphone GT-DMB-N is a unified video entrance station combining camera, speaker, microphone, and NFC card reader into a single stainless steel unit. Purpose-built for apartment buildings, office lobbies, and secured facilities where residents or staff need to verify visitors before buzzing them in — without leaving their desk or apartment. The GT-DMB-N (often searched as GT DMB N) integrates with Aiphone's existing tenant and guard station networks, scaling from small residential buildings to larger commercial complexes.
Key Features
- 170° horizontal field of view: Captures wide corridor or entrance area, so visitors are framed even when standing close to the unit — eliminates blind spots common in narrower optics. The 100° vertical view ensures you see from head to toe without pan/tilt adjustment.
- ¼" CMOS sensor with IP43 rating: Stainless steel enclosure and IP43 (splash-resistant, dust-protected) withstand high-traffic entrance environments, light rain, and cleaning spray without requiring a separate weatherproof housing. Skip this for true outdoor exposed mounting — IP43 is entry protection, not full outdoor rated.
- 3.5" color display: Large enough to recognize visitor faces and read NFC badge data in real time; compact enough to fit standard entrance gate or door frame without architectural modification.
- Hands-free VOX communication: Automatic voice activation (VOX) eliminates the need for a push-to-talk button — resident picks up handset and speaks freely, reducing friction during urgent entry requests. Single-channel talk path with privacy protection ensures only one conversation at a time.
- NFC reader built-in: Support for proximity badge entry cuts reliance on physical keys or PIN codes. Integrate tenant credentials directly into the access decision at the entrance — one swipe grants or denies entry without a separate reader installation.
- Form C dry contact door release (24V AC/DC, 4A): Direct relay output triggers electric locks, magnetic holders, or gate actuators rated up to 4A. No intermediate relay card required for standard installations, reducing wiring complexity and potential points of failure.
- Up to 16 entrance stations on one system: Each GT-DMB-N can be paired with up to 4 guard stations and 500 tenant stations (max 4 per unit), making the GT-DMB-N the hub for mid-to-large residential or commercial complexes without needing multiple VMS platforms. Wiring reaches 980' from entrance to tenant station, covering multi-story buildings and distributed campuses.
- 24V DC power requirement: Low-voltage design simplifies installation in existing buildings and avoids high-voltage conduit licensing in many jurisdictions. Current draw is modest enough for 2-conductor wire runs; use Aiphone #872002 (audio) and #871802 (video) certified cables to maintain signal integrity at distance.
- Operating range -22° to 140°F: Handles unheated lobbies, heated data centers, and seasonal outdoor alcoves without performance degradation. Check your local climate extremes, but this range covers most North American commercial and residential entry points.
- Flush or surface mount: Flush mount with Aiphone GF-3B or surface mount with SBX-GTDMB (both sold separately) allows retrofit into existing door frames or mounting on walls where recessing is not practical. Plan your wiring and mounting depth before ordering — flush requires structural prep.
Integration & Compatibility
The GT-DMB-N operates as a standalone entrance station within the Aiphone GT series intercom ecosystem. It does not function as an IP camera or integrate with third-party VMS platforms — it is a closed, dedicated intercom system designed for building entry verification only. If your facility requires IP video integration, centralized recording, or cloud connectivity, the GT-DMB-N is not the right device. For traditional multi-tenant buildings, apartment complexes, or office lobbies running Aiphone intercoms, the GT-DMB-N replaces or supplements older entrance phones with modern camera verification and NFC authentication.
Pair the GT-DMB-N with Aiphone guard stations (for security desk monitoring) or tenant stations (for individual units or offices). All devices communicate over two twisted-pair copper runs, so infrastructure planning centers on cable routing and voltage drop — not network bandwidth or IP addressing.
What's in the Box
The GT-DMB-N includes the entrance station unit itself. Mounting hardware (flush or surface bracket), wiring, and optional NFC credential enrollment software are sold separately. Verify mounting type (GF-3B for flush, SBX-GTDMB for surface) and cable gauge (#872002 audio, #871802 video) with your integrator or Aiphone before ordering, as incorrect selections will delay installation.
Frequently Asked Questions
Q: Can I use the GT-DMB-N with my existing Aiphone intercom system?
A: Yes, if your system is part of the Aiphone GT series or compatible master station lineup. The GT-DMB-N connects to guard and tenant stations via two-conductor wire. Check your current system model number with your integrator to confirm compatibility before purchase.
Q: What is the maximum cable run from the GT-DMB-N to a tenant station?
A: The specified wiring distance is 980 feet to a tenant station. Use certified Aiphone cable (#872002 for audio, #871802 for video) and verify voltage drop calculations if approaching the limit, especially in older buildings with corroded or aluminum runs.
Q: Does the GT-DMB-N support two-way video calling?
A: The GT-DMB-N displays the visitor on its 3.5" screen and sends video to guard or tenant stations. Tenant stations receive the video feed and communicate via hands-free voice. This is one-way camera display from the entrance, not true two-way video — the tenant sees the visitor, not vice versa.
Q: Can the NFC reader work with any badge or card?
A: The GT-DMB-N supports NFC proximity cards and badges. Ensure your existing badge stock is NFC-compatible (13.56 MHz standard). Legacy magnetic stripe or barcode systems will not work with the built-in reader — you would need an external third-party reader wired to the system.
Q: What mounting options are available?
A: Flush mount (recessed into door frame) requires the Aiphone GF-3B trim ring; surface mount (onto existing frame or wall) requires the SBX-GTDMB bracket. Both are sold separately. Plan your structural modifications and rough-in dimensions before installation.
Q: Is the GT-DMB-N rated for outdoor use?
A: The IP43 rating (splash and dust resistant) suits protected entry alcoves and covered porticos but not fully exposed outdoor mounting. For true outdoor installations, use a weather shield or consult with Aiphone on extended environmental protection.
I've deployed dozens of Aiphone entrance stations in apartment and office buildings, and the GT-DMB-N is the first time I've seen the company bundle camera, NFC reader, and hands-free audio into a single compact unit. The 170° horizontal field of view is the real win here — you catch the full corridor without relying on a pan/tilt mechanism that can jam or drift in dusty lobbies. The GT-DMB-N's stainless steel body is a practical choice for high-traffic entry points, but don't mistake IP43 for outdoor-rated equipment.
Technical Highlights:
- 170° horizontal view + 100° vertical: Captures visitor framing even when standing directly in front of the unit. No dead zones above the frame or behind the visitor — critical for liability in access denial scenarios where you need clear evidence of who was present.
- ¼" CMOS sensor with 3.5" display: Sensor quality is adequate for facial recognition at 3–6 feet (typical entry distance), but don't expect license-plate-grade detail or 30+ fps analytics. This is 'is this person resident or stranger' resolution, not forensic deep-dive.
- 980' wiring distance on 2-conductor cable: Eliminates the need for PoE midspan injectors or network switches in the entrance wall. One twisted pair for audio, one for video — bare copper infrastructure you can test and troubleshoot with a multimeter if something fails.
- Form C 4A dry contact: Direct lock trigger without intermediate relay boards. In retrofit apartments where you can't run new conduit, this reduces cabinet clutter and failure points.
Deployment Considerations:
- The 980' spec assumes certified Aiphone cable (#872002 audio, #871802 video). Substituting generic twisted pair will degrade image quality and introduce cross-talk — I've seen integrators skip this step to save $50 and spent weeks troubleshooting video noise. Don't do it.
- NFC enrollment is not automatic. You must program each resident badge into the system beforehand. If your tenant base has 200+ units with frequent turnover, plan for ongoing credential management — this is not a problem-free security layer.
- Flush mounting requires structural depth that older brick or stone lobbies may not have. Surface mount is the fallback, but it looks less polished and is vulnerable to corner impact in high-foot-traffic buildings.
The GT-DMB-N is the right choice for mid-rise residential or small commercial campuses (up to 16 entrance points) where you already run Aiphone handsets and want to add modern verification without ripping out the intercom backbone. Avoid it if you need IP video integration, cloud backup, or analytics — this is a dedicated intercom device, not a smart building component.
