In-Building Wireless Intercom System

Permanent wireless intercom infrastructure supporting personnel operating in Level A and Level B hazmat suits inside hazardous industrial facilities.

Full-duplex hazmat suit communications

Control room monitoring and coordination

Integration with facility radio systems

Hazmat Suit Communication Inside Hazardous Facilities

Personnel operating inside encapsulated PPE face communication challenges that conventional radio systems were not designed to address.

Respirators, Protective Masks, and High-Noise Industrial Environments often distort speech and make push-to-talk radios difficult to operate.

The In-Building Wireless Intercom System (WIS) provides dedicated communication infrastructure enabling personnel wearing Level A and Level B protective equipment to maintain clear, continuous communication during hazardous operations.

WIS connects personnel across critical facility areas including:

This architecture keeps personnel wearing Level A and Level B protective suits connected with supervisors AND facility operations throughout the work process.

WIS Facility Communication Architecture

In-building WIS deployments use rack-mounted repeaters with distributed antenna coverage, engineered specifically for each facility.

Coverage design is influenced by factors such as:

Because radio propagation is affected by structural materials and facility layout, WIS systems are engineered based on facility construction and operational workflow, not square footage alone.

Large open industrial bays may be supported by a single repeater with strategically placed antennas, while compartmentalized facilities may require additional repeaters and coverage points.

Scalable Communication for Hazardous Work Teams

Each WIS repeater supports up to six personnel operating on the same communication channel.

Repeaters can be linked together to support larger work teams and multiple operational zones.

Proven deployments of 24+ suit personnel operating SIMULTANEOUSLY across Multiple Teams.

Operational configurations may include:

Suit-Up and Entry Operations

Hazmat operations begin in the suit-up area, where personnel prepare protective equipment and communication systems before entering the work zone.

Standard procedures include:

Personnel remain in Continuous Communication Throughout the Operation until they exit through the decontamination process.

Control Room Integration and Monitoring

In-Building WIS systems connect directly to facility control rooms through the rack-mounted repeater infrastructure.

Control Room personnel can:

This integration enables supervisors to maintain Situational Awareness and Coordinate Procedures between personnel inside PPE and facility operations staff.

Integration with Facility Radio and communication Systems

The WIS platform integrates with existing facility communication systems using the C-AT Incident Commanders’ Radio Interface (ICRI).

The ICRI functions as an interoperability gateway, bridging audio between the WIS system and other communication devices without requiring facilities to replace their existing radios or communication infrastructure.

Personnel operating inside hazardous work zones typically use C-AT VHF radios as part of the WIS system, providing the wireless link between suit personnel and the WIS repeater infrastructure.

This architecture enables personnel inside hazmat suits, control room operators, and facility staff to remain connected throughout hazardous operations.

Through the ICRI gateway, WIS communications can be bridged with:

facility radio systems and operations teams
emergency response personnel
dispatch consoles
VoIP telephones
Push-to-Talk-over-Cellular (PTToC) applications
offsite secondary ICRI systems

Facilities can also route WIS audio into existing control room or operations systems, enabling supervisors to monitor hazardous work activities and coordinate communication between suit personnel and facility teams.

Communication Redundancy and Emergency Connectivity

Many facilities already maintain redundant communication paths as part of their emergency procedures.

When required, the ICRI can also bridge communications to SATCOM transport such as Starlink, extending WIS communications to remote locations. This capability can support PACE (Primary, Alternate, Contingency, Emergency) communication planning and COOP continuity operations during emergency or degraded infrastructure scenarios.

Strengthening Facility Communication Architecture

By integrating HAZMAT suit communications with existing systems, WIS extends operational visibility between personnel working inside protective equipment and the broader facility command structure.

In many facilities, this approach supports a defense-in-depth communication strategy, adding a dedicated operational communication layer within established safety and emergency response architectures.

Hazardous Operations Communication Workflow

Personnel operating inside Level A or Level B protective equipment typically move through several operational zones.

The WIS supports communication throughout these areas maintaining continuous coordination between suit personnel and facility operations staff.

Typical operational areas supported by an in-building WIS deployment include:

Control room operators monitor suit communications and coordinate activities with personnel performing hazardous procedures.

This operational workflow supports continuous communication throughout hazardous operations while maintaining coordination between personnel inside protective equipment and facility command staff.

WIS System Capacity and Scalability

WIS systems are designed to scale across Industrial Facilities where multiple personnel may Operate Simultaneously Inside Hazardous Protective Equipment.

The Architecture uses Modular Repeaters and Distributed Antenna Coverage to support operations across large facilities and complex structures.

System Capacity

Teams can operate on separate channels when required, or share a common channel depending on operational procedures and facility configuration.

In-Building WIS Facility Coverage

Coverage requirements vary based on Facility Layout and construction materials rather than square footage alone.

WIS deployments are engineered based on:

Modular WIS Infrastructure

WIS systems are engineered for facility-specific deployments and can expand as operational requirements evolve.

Typical installations include:

This Modular Architecture enables facilities to deploy communication systems that support both current operations and future expansion.

Procurement and Acquisition

WIS supports multiple acquisition paths for Government, Industrial, and Integrator-led deployments.

View full procurement and acquisition options on the main WIS page.

Engineering and Deployment Consultation

Every Hazardous Facility presents unique Structural, Operational, and Communication challenges.

C-AT works with Facility Engineers, System Integrators, and Operations Teams to design In-Building WIS deployments that support HAZMAT suit communications, control room monitoring, and interoperability with existing communication systems.

Engineering consultation can help determine:

repeater placement and antenna coverage
communication capacity for hazardous work teams
integration with existing radio systems
control room monitoring architecture
interoperability through the ICRI gateway