Aiphone GTA-DESB Modular

Aiphone GTA-DESB Modular Audio Entrance Panel Kit

Overview

The Aiphone GTA-DESB is a 1 x 3 modular audio entrance station designed for multi-tenant residential and commercial access control applications. This kit combines three functional modules—audio, digital directory display, and 10-key keypad—into a single integrated entrance panel solution. The system supports hands-free audio communication from the entrance panel directly to tenant stations, with electronic ring tone signaling. Built on the GT series modular platform, the GTA-DESB delivers flexible system architecture with capacity to support up to 16 entrance panels, 4 video guard stations, and 500 tenant stations per system installation.

Key Features

• Modular 1 x 3 Configuration: Combines GT-DB audio module, GT-NSB digital display module, and GT-10K keypad module in a unified assembly for space-efficient mounting
• Digital Directory Display: Vacuum fluorescent display (VFD) screen shows customizable greeting message, tenant directory listings, and real-time system status
• 10-Key Direct Dial Pad: Full keypad (0–9, *, #) enables direct tenant selection and access control functions from entrance without directory navigation
• Hands-Free Audio Communication: Two-way voice path with built-in speaker and microphone on entrance panel; single-channel privacy mode ensures secure communication
• Audio Module (GT-DB): Integrated microphone and speaker with in-use indicator LED (orange) and audio guidance indicators for door call-in, talk mode, and door release confirmation
• Standardized 24V DC Power: Operates on 24V DC using specified number of PS-2420UL power supplies per system configuration; electronic ring tone from entrance station
• Extended Wiring Distances: Supports up to 980 feet from main control unit (GT-BC) to farthest entrance panel and up to 980 feet to farthest audio tenant station
• Two-Conductor Wiring: Uses Aiphone #872002 2-conductor PE insulated, non-shielded 20AWG cable for audio circuits with 11.05 pf/ft specification
• Flush or Surface Mount Options: Includes GF-3B flush back box for recessed installation and GF-3F 3-module frame; optional steel GT-103HB bracket available for surface mounting
• Compact Panel Dimensions: Outer panel dimensions measure 12-5/8" H x 5-5/16" W x 5/8" D (excluding optional rain hood or surface mount box)
• Scalable Multi-Tenant Architecture: Single system supports maximum 4 tenant stations per suite, up to 500 total tenant stations, and 4 concierge stations for centralized monitoring

Integration & Compatibility

The GTA-DESB integrates seamlessly into complete GT series systems. Compatible audio tenant stations include the GT-1A audio open voice station and GT-1D audio handset station. For video-capable deployments, the system architecture supports GT-1C7W app-compatible audio/video stations and GT-1M3 video stations with 3.5" displays. Video guard stations such as the GT-MKB-N with NFC reader capability can be deployed alongside entrance audio panels. Optional relay signaling is available through the GT-RY external signaling module, and panic switch integration is supported via the GFK-PS N/C panic switch for guard emergency calls. The modular design allows expansion with GT-VB camera modules for video-enabled entrance panels when future system upgrades are required.

Package Contents

The complete GTA-DESB kit includes: GT-DB audio module, GT-DBP panel for GT-DB, GT-NSB display module, GT-NSP-L panel for GT-NSB, GT-10K keypad module, GF-10KP panel for GT-10K, GF-3B 3-module back box for flush mounting, and GF-3F 3-module frame assembly.

Jerry Tildsen

I've evaluated the Aiphone GTA-DESB during several multi-unit residential deployments, and it delivers solid performance for tenants who rely on audio-only entrance communication. The modular three-component design—audio, directory display, and 10-key pad—makes installation scheduling flexible and simplifies troubleshooting when individual modules require service. The GTA-DESB strikes a practical balance between cost and functionality for building integrators managing mid-sized access systems.

Technical Highlights:

• Extended Wiring Run Support: The 980-foot reach from control unit to entrance and tenant stations accommodates larger building footprints and reduces need for intermediate amplifiers or repeaters in typical installations.
• Directory Management on Panel: The VFD screen reduces cognitive load for visitors by displaying tenant information directly at the entrance; customizable greeting messages improve wayfinding and reduce call volume to concierge.
• Hands-Free Operation: Two-way microphone and speaker eliminate reliance on handsets or push-to-talk circuits, making the system accessible for users with mobility constraints and improving ADA compliance considerations.

Deployment Considerations:

• Plan power supply capacity early—the PS-2420UL sizing depends on total panel count and audio module load; oversizing ensures headroom for future expansion and reduces voltage sag on long cable runs.
• Use Aiphone #872002 cable stock to maintain 11.05 pf/ft impedance spec; substituting generic 2-conductor cable risks audio quality degradation and capacitive interference on long runs.
• Position the entrance panel in a sheltered or covered location if using optional rain hood; while the system itself is not rated IP66/IP67, environmental protection at entry points extends component life in high-humidity or wet climates.
• Test directory display brightness in daylight conditions before final sign-off; VFD screens can wash out in direct sunlight, and some installations may benefit from protective hood positioning.

The GTA-DESB is a reliable choice for integrators seeking a proven modular entrance solution without video complexity. Its straightforward audio path, generous wiring distance support, and straightforward installation process make it well-suited for retrofit projects and new construction in buildings where audio-only entrance communication meets operational needs. Ensure tenant station compatibility and power supply sizing are confirmed during system design to avoid field callbacks.

Product Documentation

Aiphone GTA-DESB Datasheet