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Emerald® - 4K and HD KVM over IP Matrix Switching and Extension

Introducing Unified KVM

The award winning Emerald® 4K KVM over IP is a Unified KVM system that delivers pixel-perfect HD or 4K video over an IP network. It allows reliable extension and switching of video (DisplayPort or DVI), transparent USB 2.0 and bi-directional analog audio signals across any combination and number of physical and virtual desktops and servers. Easily access both physical and virtual servers— with virtual machine support for VMware®, Microsoft® and Citrix®, using PCoIP, RemoteFX and RDP 8.1. The Emerald Remote App turns any Windows 10 device into a software KVM receiver - without the need for additional hardware.

With more capabilities than other KVM solutions currently on the market, Emerald delivers superior value, lowering your costs of ownership and saving your IT investments.

Emerald Unified KVM Features

  • Remote Computer and Server Access

    Access and manage an unlimited number of servers, PCs, and virtual machines from any location and share resources such as hardware and licenses across a dedicated KVM network, an existing IP network, or even the internet.

  • 4K over IP KVM Matrix Switching

    High performance, secure extension and switching of 4K60 (DisplayPort 1.2) and HD (DVI) video, transparent USB 2.0 and bidirectional analog audio.

  • Remote BIOS-level Access

    Benefit from BIOS-level access to troubleshoot, reconfigure, reboot and power cycle servers remotely.

  • Remote Virtual Machine Access and VM Sharing

    Provide access to virtual machines, such as Vmware® and Microsoft® over RDP 8.1 or PCoIP (Ultra), to lower IT costs. Let multiple users access simultaneously the same virtual machine.


Emerald Unified KVM Benefits


Futureproof and
Scalable KVM

Start with HD and add 4K at your own pace. Scale a small point-to-point extension up to an enterprise KVM matrix of unlimited endpoints by adding additional receivers/transmitters. Choose between a proprietary Emerald KVM matrix switch or an IP switch – or combine both.


Designed with 24/7/365 critical applications in mind, Emerald 4K is configurable with redundant network paths via SFP+ ports (fiber or copper) for fail-safe operation. Supports complete switchover to a backup control room location.


USB Emulation

True USB emulation, supporting USB HID devices, X-Keys, USB push buttons, Wacom® tablets, USB mass storage, and other high-speed USB 2.0 devices.

Remote Access to
Virtual Machines

Enable multiple users to access any number of physical and virtual servers and desktops. Support for VMware® and Microsoft®, using PCoIP Ultra, PCoIP, RDP 8.1, and RemoteFX.


Pixel-perfect 4K
and HD Video

Extend and switch HD and 4K video. Adjust compression in five steps up to pixel-perfect image transmission — every pixel visualized at 60 fps with 10-bit color depth.


KVM Software

Use the Emerald Remote App to turn any Windows 10 device into a software KVM receiver. Connect to multiple transmitters and virtual machines simultaneously and from everywhere.

Emerald Remote App For Microsoft Windows® 10/11

The Emerald Remote App is a new KVM software receiver that enables remote computer access to both physical and virtual machines from any Windows 10 device. The Remote App increases mobility, device access and monitoring on your Emerald System and delivers a full HD video desktop experience up to 40 fps from multiple connections that can be launched simultaneously. This facilitates device management and access to your Emerald KVM network from anywhere you want.

  • Supports HD video up to 1920 x 1200 and provides access to both physical and virtual machines over an IP network or WAN connections
  • Open connections to multiple devices simultaneously
  • Licence-based access authenticated by the Boxilla® KVM Network Manager in real time, ensuring the Emerald administrator has full control (view licence options)

(1) Boxilla KVM Manager is required for demo purposes

Emerald GE PCoIP Ultra Gateway

Emerald® GE is a new unique solution, which leverages cutting-edge PCoIP® Ultra technology to enable users to access the cloud or a virtual machine just as they would a physical system. Because the gateway can be implemented across multiple receivers, users can access virtual machines in a shared model rather than a conventional single-user (point-to-point) model.  With extremely low bandwidth requirements, the system supports secure, high-definition, and highly-responsive remote access over a LAN or WAN.


Industry Applications

Emerald KVM Matrix Switch Use Cases

Danish Hospital implements KVM matrix switching solution to simplify collaborative diagnosis

Mar 19, 2020, 15:14 PM
Danish Hospital implements KVM matrix switching solution to simplify collaborative diagnosis
Title : Danish Hospital implements KVM matrix switching solution to simplify collaborative diagnosis
Company : Aarhus University Hospital
Company link :


The new Danish Center for Particle Therapy at Aarhus University Hospital, one of the largest hospitals in Europe and named best hospital in Denmark 11 years in a row, provides highly specialized radiation therapy for cancer patients from across the country. With its new 71-ton particle accelerator (or cyclotron), the center uses particle therapy — a gentler alternative to conventional radiation therapy — to treat children and adults with tumors in the brain or near the spine. The 9,500-square-meter Danish Center for Particle Therapy has the capacity to perform approximately 30,000 treatments annually for approximately 1,200 patients, with treatment overseen by 120 full-time employees, as well as researchers and medical students.


The Aarhus University Hospital headquarters and main department, known as The New University Hospital (DNU), is the largest single hospital in Denmark and one of the largest in Europe. Thus, a meeting between two or more doctors to review a patient’s brain or spine scan could require each medical expert to walk 20 minutes across the hospital campus to discuss that case. The Danish Center for Particle Therapy therefore needed a better way to give doctors from different departments across the DNU campus shared, simultaneous access to patients’ brain and spine MRI and CT scans. More specifically, the center needed a simple, secure solution for flexible video delivery that could support collaborative diagnosis and development of treatment plans.

“Here in Denmark we provide cancer care through a package of treatments and services that are tied to a fixed timeline,” says Stefan Kalmar, IT project manager at the Danish Center for Particle Therapy. “In order to diagnose and treat patients in a more timely manner, rather than in ‘batch’ meetings scheduled for when several doctors can physically meet up in a room, we needed a video extension and switching solution that could give these medical experts more convenient access to high-quality images for joint review.”


The Danish Center for Particle Therapy is using three Black Box Emerald SE transmitters for KVM (keyboard, video, mouse) signal extension and switching over IP to transmit high-quality video and control signals to multiple receiver units, located within different departments across DNU. The Boxilla centralized KVM manager connects and manages the complete KVM solution from a single intuitive access point.

With Emerald receivers deployed at each of three different rooms, doctors working at all three locations can simultaneously view the brain or spine scans of patients. Thanks to remote control over KVM switching, any one of these users can take control of the display and use illustration tools to circle or highlight particular areas of interest on a scan or other on-screen image.

Emerald simplifies extension and switching of HD (DVI) video, high-speed USB 2.0, and bidirectional analog audio so that doctors can focus on collaborating with colleagues rather than the supporting technology. Boxilla gives IT staff a straightforward solution for KVM configuration, creating and managing user profiles and access rights, adjusting bandwidth usage limitations, and evaluating system performance at any given time.


The Black Box solution deployed by the Danish Center for Particle Therapy brings greater flexibility and efficiency to the treatment of cancer patients in Denmark. Because Emerald intuitively shares video across sites, nontechnical users — doctors and other specialists — can readily take advantage of the system. The solution gives users at all three locations within DNU the functionality they need to take control over the video being displayed and to provide input on the images shown simultaneously on all three screens in the different locations.

Access to brain and spine scans by doctors across three different locations within DNU is beneficial primarily because it reduces the time and cost associated with diagnosis and treatment. Specialists from different departments can quickly and easily collaborate and come up with a treatment plan. Patients can instantly get a second opinion from other doctors without having to travel to another part of the hospital.The combination of the Black Box Boxilla KVM manager with the Emerald SE extenders not only helps the hospital to comply with security requirements regarding the visibility and transmission of patient data but also makes it easy to configure and manage the complete KVM system from a single intuitive access point.

One of the reasons for implementing Emerald was the system’s support of lossless transmission of HD video, whereas many common remote desktop (software) solutions today use lossy compression algorithms that could result in inaccurate visualization of critical medical imagery. As a KVM-over-IP system, Emerald ensures that video quality remains uncompromized — critical to effective diagnosis by multiple specialists — and that the overall solution is responsive, without lag that can make effective collaboration difficult.

“It is difficult to overstate the impact of this new remote video-sharing system in improving our efficiency,” says Kalmar. “In addition to eliminating the considerable amount of time required to walk to and from each patient care meeting, the solution makes consulting with other doctors much more convenient. As a result, it is easier for us — and the center as a whole — to keep patient treatment on schedule and to maintain a high standard of care.”

“This new remote videosharing system is improving our efficiency: eliminating the considerable amount of time required to walk to and from each patient care meeting makes consulting with other doctors much more convenient.”
Stefan Kalmar, IT project manager at the Danish Center for Particle Therapy (Aarhus University Hospital)
Tags :
  • Emerald SE
  • Europe, Middle East, Africa
  • Healthcare
  • KVM Management
  • KVM Matrix Switching
  • Remote Computer Access
Danish-Hospital-implements-KVM-matrix-switching-solution-to-simplify-collaborative-diagnosis Danish-Hospital-implements-KVM-matrix-switching-solution-to-simplify-collaborative-diagnosis
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Aplicaciones del Conmutador Matricial KVM Emerald™

Network Application


Application diagram: Emerald IP-based KVM matrix switching application.

Multiple Site Application


Application diagram: Emerald KVM matrix connecting a control room and a backup site.

Resilient KVM Networks


Application diagram: Emerald KVM transmitters and receivers providing redundant network paths in case of failure.

Virtual Machine Connectivity


Application diagram: Remote, high-speed access to virtual machines, supporting Vmware®, Microsoft® and Citrix®.

Emerald Remote App


Application diagram: Emerald Remote App installed on a laptop connected to Emerald Transmitters and a virtual machine via Boxilla.

Emerald Product Comparison

FeatureEmerald 4KEmerald PEEmerald SEEmerald ZeroU TXEmerald Remote App
Max Video Resolution4096 x 2160 at 60Hz (DisplayPort 1.2)1920 x 1200 at 60Hz (DVI)1920 x 1200 at 60Hz
Video QualityPixel perfectVisually losslessHigh quality ~35fps
Dual Network PortsYes, (2) SFP+Yes, (1) SFP, (1) CATxNo, (1) CATx-
Peripheral SupportAll USB 2.0 devicesUSB HID only
VM SupportPCoIP, RDP/RemoteFXRDP/RemoteFXRDP/RemoteFX-RDP/RemoteFX
Bidirectional Analog Stereo Audio(Speaker only)-
System ScalabilityPoint-to-point extension up to unlimited KVM matrix

Emerald Product Portfolio


Emerald Remote App Licenses

The Emerald Remote App turns any Windows 10 device into a software KVM receiver. Choose from multiple licences allowing 1, 5, 10 or 20 connections (Boxilla™ required).


Emerald ZeroU Transmitters

Little bigger than your smartphone, these transmitters consume zero rack space and can be powered over USB. They support up to 1920x1200 resolutions (DVI), USB HID and audio.


Emerald IP Network Switches

Depending on the number of endpoints connected and the video resolution required, you can choose between a variety of different IP Network Switches supporting 1/10/100 Gbit from 12/28/32/48 ports.


Emerald PCoIP Gateway

  • Emerald GE


Emerald SFP Modules

Emerald supports both CATx copper and fiber connections from SFP/SFP+ slots. Choose your SFP module(s) based on the required transmission bandwidth.

Associated Products

While Emerald is a one-of-a-kind solution that opens up the revolutionary new world of Unified KVM, the platform builds upon time-tested KVM technology evolved by Black Box since the early 1990s. Emerald works flawlessly with many popular Black Box product families, including: the DKM proprietary direct-connect KVM system; the Freedom II KM Switch for easy switching just by moving a mouse between screens; the ControlBridge® system for one-touch, multisystem control; and the award-winning Boxilla® KVM Manager.


Freedom II
KM Switch

This 4 or 8 port USB KM Switch allows switching between up to 8 connected PCs by just moving your mouse from one screen to another. Compatible with all Emerald products.


Room Control Automation

Versatile touch-based multisystem room control processor. ControlBridge allows control room operators to switch between sources or whole room setups.

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