High Sec Labs SM40NU-4 Secure 4-Port KM Switcher / NIAP PP4.0 / CAC Port / Audio Freeze / USB

Description

The SM40NU-4 Secure 4-Port KM Switcher provides controlled keyboard and mouse access to four independent systems while maintaining hardware-enforced separation. It is designed to allow a single set of USB keyboard and mouse peripherals and shared audio output to be used across multiple computers. Security certification and dedicated smart card support make the unit suitable for sensitive environments.

The switcher is NIAP Common Criteria PP4.0 certified, offering proven peripheral isolation and tamper-resistant behavior. It includes a dedicated CAC smart card port and a 3.5 mm audio jack with the ability to freeze channel audio or CAC sessions while switching. Seamless cursor switching enables users to move the mouse across displays to change active systems without hotkey sequences.

Technically, the SM40NU-4 supports four sources and USB Type A/B keyboard and mouse connections alongside USB Type A host ports. The audio interface uses a 3.5 mm jack and power is supplied by an external 12VDC 1.5A adapter. Operating and storage ranges, product lifecycle, and certifications are documented to meet procurement and deployment requirements.

Connectivity covers USB keyboard and mouse interfaces, an external USB port, a dedicated CAC reader port, and audio output that can be frozen per channel during switching. The device supports Windows, Linux, and Mac hosts and offers multi-monitor control up to four displays per computer when vendor drivers are installed on Windows. Compatibility with standard USB HID devices and line-level audio ensures broad interoperability.

Typical use cases include government workstations requiring secure peripheral isolation, defense command centers managing multiple classified and unclassified systems, and organizational operation centers that need central peripheral control without compromising separation. The secure CAC passthrough and audio freeze features address common operational security requirements. Cursor-based switching reduces training and speeds operator workflows in multi-system environments.

Installation is straightforward – rack or shelf mount placement with an external power brick, standard USB and audio cabling, and driver installation when multi-monitor extended modes are needed on Windows. The enclosure and components are built to industry standards and backed by a two year warranty and a defined 10 year product life-cycle. Documentation and compliance certifications simplify integration into regulated IT environments.