Typical EMS Communications Installation

This example is for an EMS system installation using a US-67D UltraSound Intercom with optional MRIM-2 Mobile Radio Interface Module and accessories. This system will support up to 6 headset positions with 3 of the positions having transmit capability on two radios. The MRIM-2 allows a cellular telephone to be added to the system.

To understand how these communications devices function, roll your mouse across the product names on the right-hand side. For complete product information, click on the name of the product. If you are unable to view this properly, click here to view it as a PDF diagram.

SE-48 Headset

Our most popular headset for high-noise environments: lightweight, comfortable, and super-tough.

SE-18 Headset

Our most popular headset for low/medium-noise environments.

UltraSound Voice Activated
Dual Intercom

Voice activated, specifically designed for emergency vehicles and fire apparatus, and available in single and dual radio models.

MRIM-2 Mobile Radio Interface Unit

Connects between a headset, PTT switch, and mobile radio, or to connect a cellphone and/or bluetooth device to your intercom.

Mobile Radio Y-Adapter

High-quality adapters that connect Sigtronics emergency intercoms and MRIM-2 to a mobile radio.

Installation Kit

Each intercom includes an installation kit with mounting boxes, headset jacks, and PTT switches.


Additional compatible parts and accessories, including the Belt PTT Headset Extension Cable and the Foot Operated PTT Switch, are available as needed.

Quala-Tel is a leading provider of emergency communication equipment for first responders. We provide vehicle intercom systems, wired and wireless headsets, and portable radio accessories to EMS, fire, HAZMAT, rescue, and police.

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