Aiphone GT-1A Open Voice Audiio Tenant Station

Aiphone GT-1A Audio Tenant Station

The Aiphone GT-1A is an audio-only tenant station engineered for multi-unit residential and commercial entry systems. Designed for surface wall mounting with a compact, streamlined profile, the GT-1A delivers reliable hands-free and push-to-talk audio communication between tenants and entrance panels, concierge stations, or security guard stations. Its straightforward feature set and simplified 2-conductor common bus wiring make it an economical choice for properties requiring audio-only intercom endpoints without video capability.

Overview

The GT-1A operates on 24V DC power supplied from the Aiphone GT-BC power supply. It supports up to 4 tenant stations per resident location, enabling distributed audio communication throughout multi-unit properties. The unit is equipped with a built-in speaker and microphone, along with dedicated talk, door release, and optional service buttons. Communication mode selection between hands-free (VOX) mode and push-to-talk (simplex) operation allows flexibility to match installation requirements and tenant preference. The station receives varying ring tones from the entrance panel, concierge, or doorbell to notify residents of incoming calls.

Key Features

• Hands-Free and Push-to-Talk Modes: Operate in VOX (voice-activated) mode for automatic two-way conversation or press-to-talk simplex mode for manual communication control.
• Door Release Integration: One-touch door release button provides direct control to the door where communication is established, enabling tenants to grant visitor access without leaving their unit.
• Concierge/Security Guard Calling: Dedicated button allows tenants to call security, concierge, or guard stations independently of entrance panel calls.
• Optional Service Button: Secondary option button triggers a normally open contact on the back of the unit, enabling activation of external devices such as emergency alert systems or auxiliary relays.
• Individual Doorbell Notification: Optional unique tone assignment notifies residents when someone is at their specific door, improving response times in large properties.
• Exterior Lighting Control: Optional capability to activate outside lighting while speaking with visitors at the entrance, improving visibility and security during evening hours.
• Separate Volume Controls: Independent adjustment of call tone and communication audio levels accommodates varying acoustic preferences and hearing requirements across tenant populations.
• Panic Call Integration: Supports optional emergency call stations (such as Aiphone GFK-PS panic switch), receiving emergency tones and routing urgent calls to concierge stations.
• Simple 2-Conductor Wiring: Common bus architecture uses 2-conductor, solid non-shielded PE-insulated cable (Aiphone #872002), reducing installation complexity and material costs compared to multi-conductor systems.
• Compact Wall-Mount Design: Mounts in standard 3-gang electrical box or on flat surfaces using optional MCW-S/A desk mount adapter (sold separately), integrating seamlessly into residential interiors.

Technical Specifications

Power: 24V DC supplied from GT-BC. Communication: Hands-free (VOX) or push-to-talk simplex. Capacity: Maximum 4 tenant stations per resident location. Wiring: 2-conductor, PE-insulated solid conductor, common bus configuration. Recommended cable: Aiphone #872002. Mounting: Surface wall mount in 3-gang electrical box or using optional desk mount adapter MCW-S/A. Operating Temperature Range: 32–104°F (0–40°C). Dimensions: 6-7/8" H × 4-15/16" W × 1-1/4" D. Weight: Approximately 0.70 lbs (330g).

Installation Considerations

The GT-1A integrates into existing Aiphone GT Series multi-unit entry systems and is compatible with entrance panels, guard stations, and optional accessory modules including external signaling relays (GT-RY) and panic switches (GFK-PS). Installation requires only basic 2-conductor wiring, making the station suitable for retrofit applications where minimizing wire runs and associated labor is a priority. The unit's simple electrical interface reduces commissioning time and support overhead compared to networked or video-enabled alternatives.

Marty Allison

I've deployed the Aiphone GT-1A in several multi-unit residential properties where audio-only intercom coverage was sufficient and budget constraints favored simplicity over multimedia capability. The GT-1A strikes a practical balance—it delivers solid hands-free and push-to-talk audio communication without the complexity or cost of video endpoints. For properties with 20+ units, the ability to place multiple GT-1A stations on a single 2-conductor bus keeps wiring and infrastructure costs low.

Technical Highlights:

• VOX and Simplex Flexibility: The switch between hands-free voice activation and press-to-talk modes accommodates different tenant workflows and security protocols. Hands-free is convenient for quick queries; simplex is preferred where background noise or privacy concerns require deliberate communication control.
• Door Release at the Tenant Station: Placing the release button on the GT-1A unit itself (not requiring a separate relay module) simplifies the architecture and reduces response latency when tenants need to grant access.
• Optional Service Button Integration: The normally open contact output supports panic switches and external device triggers, extending the station's utility beyond basic intercom to include emergency signaling and auxiliary automation.

Deployment Considerations:

• For properties with more than 4 units per entrance, plan multiple entrance panels or use guard stations to distribute call load. A single entrance panel can serve multiple resident locations, but each location supports only 4 tenant stations on the common bus.
• Verify 24V DC power budget before installation. All GT-1A units share the GT-BC power supply, so confirm capacity for the total number of simultaneous stations. In large deployments, multiple power supplies may be required.
• The 2-conductor wiring requirement assumes sites already have or can easily run solid PE-insulated pair—shielded or twisted-pair cable is not necessary, which can reduce material cost but may limit future expansion to more advanced systems requiring different cable characteristics.

The GT-1A is a dependable choice for facilities prioritizing straightforward audio intercom functionality, rapid installation, and low lifetime operating costs. Its proven integration within the Aiphone GT Series ecosystem and minimal wiring footprint make it well-suited for both new construction and retrofit projects in residential and small commercial settings.

Product Documentation

Aiphone GT-1A Datasheet