Comelit UT9310M Magnetic Induction Module

We've seen the UT9310M solve a recurring friction point in access-control deployments: hearing-impaired users (and aging building occupants with high-frequency hearing loss) struggle with speaker audio at entrance stations, especially in noisy lobbies or outdoor areas. Most integrators' first instinct is to crank speaker volume, which creates feedback and annoys everyone else. The T-coil induction approach sidesteps that entirely. The user's hearing aid does the work—picks up the magnetic field, processes it through their personal audio profile and amplification settings. From the facility's perspective, it's a one-module install that requires zero audio engineering, zero speaker tuning, and zero additional wiring if the panel is already on PoE+. On compliance documentation (ADA Title II for government, Title III for commercial), T-coil induction is a recognized accessibility accommodation that doesn't trigger the same scrutiny as speaker-volume-based fallbacks. We've deployed this in healthcare check-in areas, government office buildings, and corporate campuses where accessibility audits are routine. The differentiation versus external hearing loop amplifiers is cost and complexity: you avoid the capex and wiring labor of running loop cable around the entrance area, and you avoid the ongoing tuning work (loop amplifiers drift, require periodic calibration). Comelit's PoE+ integration also eliminates a separate power infrastructure conversation—if the panel is already on network power, you're done. The real limitation is that it only helps users with T-coil-equipped hearing aids. Users with cochlear implants or older hearing aids without induction pickup don't benefit. But for the 70-80% of hearing aid users who have T-coil capability, it's invisible, immediate, and compliant.

Technical Highlights:

• T-Coil Magnetic Induction Field: The module generates an electromagnetic field when audio is transmitted from the door station. Hearing aids with an active T-coil (telecoil) receive the signal directly without speaker dependency. This is a proven accessibility standard used in theaters, courtrooms, and churches for decades—we're not inventing the approach, we're applying it to entrance access control.
• PoE+ (802.3at) Power Draw: The module draws power from the same PoE+ circuit that feeds the Comelit Ultra panel. No auxiliary 24V supply required. This is significant for retrofit installations in older buildings where running new power lines to the entrance location is expensive or impossible.
• Ultra Module Slot Compatibility: Installs in one standard DIN rail position. You can mix and match the UT9310M with reader modules, relay expansions, and other Comelit accessories in the same frame. This modular flexibility means you don't have to redesign the entire entrance system—just add the induction module where it's needed.
• 4MP System Integration: The module is compatible with Comelit's 4MP surveillance and intercom backbone. If you're standardizing on Comelit IP-based entrance systems, the UT9310M fits the architecture without requiring separate audio or accessibility subsystems.
• Passive Audio Coupling: The induction field is passive—no active amplification, no audio processing by the module itself. The hearing aid controls volume and EQ. This reduces maintenance and eliminates the risk of audio feedback or distortion from the facility side.

Deployment Considerations:

• T-Coil Requirement: Users must have hearing aids equipped with a T-coil and know how to activate it. Older hearing aids or certain cochlear implant models don't support T-coil pickup. Before specifying the UT9310M as the primary accessibility solution, verify what proportion of your user base has T-coil-capable devices. It's not universal, but adoption is high in the hearing aid market.
• Induction Field Range: The magnetic field has effective range of roughly 1-2 feet from the module. If the door station is mounted more than 2-3 feet away, the user may not reliably receive the signal. Plan the module placement inside the entrance frame, close to the intercom speaker output, not in a remote cabinet.
• PoE+ Circuit Verification: Confirm that your network switch supplying the Comelit Ultra panel supports PoE+ (802.3at, min. 30W per port). If your installation is using older PoE (802.3af, 15W max), the module will not power on. This is a quick switch audit, but it's a common miss in retrofit jobs where the network infrastructure hasn't been upgraded.
• No Video or VMS Integration: The UT9310M is a passive audio accessory. It doesn't add cameras, record audio, or integrate with your VMS as a distinct system. It's purely an audio coupling device. If you need recording of door station conversations, that's handled by the door station camera/audio module itself, not this accessory.
• Cosmetics and Housing Fit: The white aluminum housing is designed to match Comelit Ultra modules. If you're installing it in a non-Comelit frame or a mixed-brand entrance system, the appearance will stand out. Comelit doesn't offer alternate colors for the UT9310M, so aesthetic matching is limited to native Comelit deployments.

The UT9310M is ideal for integrators supporting compliance-driven access control retrofits, especially in healthcare, government, and corporate facilities where hearing accessibility is an audit requirement. It's also the go-to module for entrance systems where noise levels (outdoor areas, manufacturing lobbies, transit hubs) make speaker-based communication unreliable. Spec it when you need accessibility to be invisible and cost-effective—not a separate intercom tier or a visitor accommodation process. For more Comelit Ultra modules and entrance accessories, visit the Comelit catalog.