The Intercom System That Outlasts the Building It's Installed In

Purpose-built for corrections, behavioral health, and secure institutions. Over 30 years of proven performance. Still running in facilities that installed it in the 1990s.

Intelligible Audio. Rock-Solid Reliability. Zero Compromises.

The MicroComm DXL is our current-generation intercom system for secure and institutional environments. It’s a complete platform that combines distributed IP architecture, dedicated audio amplifiers, encrypted communication, and a level of reliability that most commercial intercom systems simply cannot match.

Here’s the number that matters most: most intercom systems get replaced after 10 or 15 years. MicroComm systems have been running for over 30. Albert Vanden Boer, who has been with Harding for more than 25 years and walked through roughly 2,100 jails in that time, puts it plainly. Once word gets out about how reliable the DXL is and how little maintenance it needs, facilities come looking for it. Maintenance directors hear about it from their counterparts in the next county over. That kind of reputation is not something you can buy.

The DXL is also the platform that gave us Scream Alert, a feature that has become one of the most important safety tools in the facilities we serve. If a staff member is in a situation where they cannot reach a radio or press a panic button, the system hears them. That is not a small thing in a corrections or behavioral health environment.

Built for the Environment. Engineered for the Long Haul.

Over 30 Years of Field-Proven Reliability

MicroComm systems have been in service for over three decades. Many of the systems we installed in the 1990s are still running today. When we say this platform is built to last, we mean it. Facilities that would have replaced a commercial intercom system two or three times over are still using the same MicroComm system they started with.

Three Deployment Options, One Platform

Whether you are retrofitting an existing facility, building new with a 2-wire system, or deploying a full IP Ethernet network, the DXL platform supports all three. If you already have stations that work, you may not need to replace them. If you are running an older MicroComm DXI system, we still carry the parts and expertise to keep it running. And when you are ready to migrate, the transition is designed to be as smooth as possible.

Every Station Has Its Own Amplifier

In a traditional intercom system, multiple stations share an audio path. That means crosstalk, call blocking, and degradation when more than one conversation is happening. The DXL gives every station its own dedicated 1W audio amplifier. Each line is its own. The 400 Series 2-wire system includes a microphone preamplifier that improves audio quality even further, delivering clarity that is noticeably better than 4-wire systems.

Scream Alert and Event Logging

Scream Alert automatically initiates a call to the master station when audio levels in a room reach a certain threshold. For staff who may be alone and vulnerable, that feature can be the difference between a close call and a tragedy. Event logging captures every call, every interaction, and every event with a timestamp. When a facility needs to prove what happened and when, the logs are there. Albert has seen a lawsuit cancelled immediately because the DXL had the records the facility needed.

One Platform. Every Application You Need.

The MicroComm DXL is not a single product. It is an ecosystem. Exchanges, master stations, touchscreen stations, expanders, custom stations, and accessories all speak the same language and work together without forcing your team to manage separate platforms or vendor relationships.

Here is what a complete DXL system looks like:

Exchanges

The exchange is the heart of the system. It manages communication, routing, and system logic for the stations connected to it. Exchanges are available in configurations that support small single-building installations all the way up to the 30-exchange deployment at Utah State Correctional Facility and the 27-exchange, 50-expander network at Tarrant County Correctional Center in Fort Worth.

Master Stations

Available in telephone-style and touchscreen configurations. Master stations give staff a central point of control for monitoring, paging, and responding to calls. They support privacy mode for confidential communications, event logging, and integration with video visitation systems.

Standard and Custom Stations

DXL stations are supervised and monitored. If a station goes offline or gets damaged, the system tells you exactly where and when. Custom station plates and back boxes are available for facilities with specific dimensional or environmental requirements. At Utah State Correctional Facility, we designed custom boxes that could be installed in concrete walls and serviced from outside the cell, because everything had to be accessed from the corridor.

Expanders

Expanders add capacity to the system without requiring a new exchange. Tarrant County runs 50 expanders across its two buildings. Utah State runs additional expanders as the facility has grown. The system scales with your needs, one expander at a time.

Video Visitation

DXL supports video visitation systems with one-to-one conversations and privacy mode. When an inmate needs to speak with legal counsel, the privacy setting ensures no one can listen in. When family members visit, the system supports clear, reliable communication.

Paging and Music

The DXL supports paging with pre-recorded announcements, so you can broadcast messages across the facility without tying up a staff member. It also supports line-level input for music sources, so you can play background music in common areas. Bell schedules and music setup are simple to configure and maintain.

From a Single Building to an Entire Campus

The DXL is genuinely versatile. We have seen it deployed in maximum-security correctional facilities with thousands of stations, in behavioral health units where patient safety is the priority, in K-12 schools that need reliable paging and lockdown messaging, and in government buildings that require TAA and NDAA compliance. There is no project type that the DXL cannot handle. The system scales up and it scales down, without forcing you to compromise on features or reliability.

Corrections and High-Security

Behavioral and Healthcare

K-12 Education

Government and Military

Commercial and Institutional

Campus and Multi-Building

Support That Does Not Disappear After the Sale

Our technical support team is available Monday through Friday, 7 a.m. to 5 p.m. Mountain Time, with on-call coverage for weekends and statutory holidays. We provide phone and remote support, documentation, AutoCAD drawings, and parts availability. For legacy systems, we maintain technical archives and can support troubleshooting for systems installed decades ago.

That support is not an afterthought. It is the reason our customers stay with us. When you call, you get someone who knows the product and knows your facility. You get answers, not a ticket number.

We do not install the systems we sell. That is your contractor’s job. But we work closely with contractors throughout the project to ensure the system is configured and commissioned correctly. We support the installation without replacing the installer.

Compliant Where It Counts

MicroComm DXL is designed with TAA and NDAA compliance requirements in mind. For specifiers working on federal or government-funded projects, we can provide the documentation needed to support your submittal.

For facilities in North Ameria, the DXL platform is available in configurations that meet the requirements of each market. If you are working on a cross-border project or need to confirm which configuration applies to your facility, reach out to our team and we will walk you through it.

One Building or Thirty. Same Platform.

The DXL network supports distributed IP architecture, which means each exchange operates independently but stays connected to the larger system. If one building loses connectivity, the others keep running. If a single exchange goes down, the rest of the facility does not lose communication.

That resilience is built into the core design. It is not an add-on or an upgrade. It is how the system was built from day one, because the facilities we serve cannot afford to have the entire intercom system go down because of a single point of failure.

The system also supports integration with existing infrastructure and third-party systems where needed. If you are working with a specific requirement, talk to our team. We have been doing this for over 30 years and we have likely solved a similar problem before.

Find What You're Looking For

Browse the full MicroComm DXL product range below, including exchanges, master stations, standard and custom stations, expanders, accessories, and legacy DXI parts. Data sheets and documentation are available on each individual product page.

Could not find any products to display.

Everything You Need to Specify, Install, and Support Your System

MicroComm DXL System Brochure (PDF)

DXL Parts List

DXL Installation Manual

DXL Programming Manual

System Specifications (for Engineers)

Sample System Diagram

AutoCAD Drawings

TAA and NDAA Compliance Certificates

Testimonials

Trusted by the People Who Use It Every Day

For several years we have installed the Harding DXL intercom system for Buffalo Trail Public School Div. At least 12 schools are now operating without any issues. The DXL system is very robust and reliable and the schools appreciate the ease of use for paging and classroom communications. The bell schedule and music is easy to setup and maintain. Buffalo Trail schools are very pleased with the DXL security features such as lockdown messaging, alarm interface, and sound monitoring capabilities.

Not Sure Which Configuration Is Right for Your Facility?

Our intercom team has been doing this for more than 50 years. Whether you are specifying a single-building system for a small behavioral health unit or designing a full campus-wide network for a correctional facility, we can help you figure out exactly what you need. No sales pressure. Just answers.

HIDE EVENTS

ASIS GSX 2026, Atlanta, Georgia. Booth # 4316