The ServSwitch Secure KVM-switch cable from BlackBox is a specially developed connection cable for security-critical IT environments where the TEMPEST certification of the used KVM switches must be maintained. It serves as a connecting element between a computer (VGA, USB or PS/2) and a ServSwitch Secure KVM switch. The cable is equipped with large ferrite cores at each connector to minimize electromagnetic interference and thus reduce electromagnetic radiation, which is crucial for use in sensitive environments. The construction ensures stable and secure data transmission, meeting the requirements of confidential IT systems.

Applications
This cable is designed for use in security-critical IT infrastructures, particularly in environments where the TEMPEST certification of KVM switches must not be compromised. This includes, for example, military, governmental, or industrial facilities where avoiding electromagnetic radiation is essential. It enables the connection of computers with VGA, USB, or PS/2 interfaces to a ServSwitch Secure KVM switch, allowing multiple systems to be operated via a common keyboard, mouse, and display control.

Functions and Equipment in Detail
The cable features a main strand with an HD26 connector, which connects directly to the ServSwitch Secure KVM switch. At the other end, depending on the model, various connectors are available: for the EHNSECURE2 variant described here, a USB Type-A connector is integrated, used for connecting keyboard and mouse to a USB computer. The use of USB connectors enables a compatible and standardized connection to modern computers. The pin assignment of the VGA connector is specifically adapted: pin 9 is removed, while all other pins are connected, which is required for TEMPEST compliance.

Technology Explained Simply
The integration of ferrite cores at each connector suppresses high-frequency interference that may arise from data transmission. These interferences could otherwise jeopardize the TEMPEST certification of the entire system, as they could potentially be exploited for data eavesdropping. The HD26 interface is a special, robust connection developed for connecting to KVM switches, ensuring a secure and mechanically stable connection. The use of USB and VGA connectors ensures universal compatibility with common computer hardware.

Compatibility and Accessories
The cable is exclusively designed for use with ServSwitch Secure KVM switches from BlackBox. It is not suitable for other KVM systems or general connection purposes. The model designation EHNSECURE2 refers to the USB connection option, designed for keyboard and mouse. Other models such as EHNSECURE1 (PS/2) or EHNSECURE3 (USB with CAC support) are also available, but are not part of this article. Compatibility is limited to the ServSwitch Secure series, specifically developed for TEMPEST-compliant environments.

Installation and Mounting
Installation is performed by directly connecting the HD26 connector on the cable to the corresponding port on the ServSwitch Secure KVM switch. At the other end, the USB Type-A connector is connected to the computer. The connection is mechanically stable and requires no additional tools or adapters. The correct pin assignment of the VGA connector (pin 9 removed) is already integrated into the cable and requires no manual adjustment.

Operational Advantages
The use of this cable ensures the maintenance of TEMPEST certification, which is essential for security-critical applications. The integrated ferrite cores minimize electromagnetic interference, enhancing data integrity and system security. The connection is reliable and stable, contributing to continuous operational capability in sensitive IT environments. The warranty is 2 years under the Double Diamond™ standard, highlighting the high reliability of the product.

Protection Rating
The cable is not designed for outdoor use or in damp environments. It is intended for indoor use, with no specific protection rating (e.g. IP classification) specified. Use in environments with high mechanical stress or aggressive chemicals is not intended.

Warranty
The product is supplied with a 2-year warranty under the Double Diamond™ standard, emphasizing the high quality and reliability of the product. The warranty applies to normal use in security-critical IT environments.

Scope of Delivery
The scope of delivery includes the ServSwitch Secure KVM-switch cable (model EHNSECURE2) with the described connectors. The description is based on the manufacturer's product information.