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Black Box 10-Gigabit Ethernet Network Switch, 28-Port

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by  BLACK BOX CORPORATION    |    PCN#  8RH558    |    MFG#  EMS10G28    |   
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Product Highlights:
  • 1RU high-density 10-Gigabit switch
  • 28 ports 10Gbps SFP+ and 2 ports 100Gbps QSFP28
  • 960-Gbps (full-duplex) non-blocking, cut-through switching fabric delivers line rate performance under a full load
  • Supports 10G SFP+ transceivers
  • Redundant, hot-swappable power supplies and fans
  • Scalable L2 and L3 Ethernet Switching with QoS, ACL and a full complement of standards based IPv4 and IPv6 features including OSPF, BGP and PBR
Product Condition: New and Factory Fresh
Limited Warranty: 2 Year
Shipping Weight: 29 lbs.
List Price: $12,475.00
Our Price: $11,597.70
You Save: $877.30 (7%)

Black Box 10-Gigabit Ethernet Network Switch, 28-Port

Emerald is the first Enterprise KVM Extension and KVM Matrix Switching solution that delivers pixel-perfect video with 2K/HD or 4K/60 resolutions at 10 Bit color depth over an IP network.

The flexible and scalable system supports any number of workstations and servers. In addition, it simplifies virtual access, making it easy for you to use any combination of physical and virtual servers.

It provides operators and administrators with fast and easy-to-use access to their target PCs/servers with premium video quality and a rich peripheral set supporting stereo audio and up to any four true emulated USB 2.0 devices including Wacom® tablets. Administrators will like comprehensive management with convenient configuration options in line with high-level network security and reliable 24/7 operation.

An Emerald KVM network may start small, but it's infinitely scalable to meet your expansion needs and future technology path just by adding endpoints, with no additional chassis or cards required.

System by Design

Emerald comprises of a choice of transmitters connecting computers or virtual machines to the system and receivers connecting the user consoles. High-performance Emerald network switches with 12, 28,- 32-, or 48 ports ensure trouble-free KVM over IP extension and matrix switching connections. A range of SFP/SFP+ transceivers proofs best performing video quality and KVM extensions over the required distances.

Use the Emerald transmitter to connect DisplayPort servers with resolutions up to 4K60, transparent USB, serial, and audio to your Emerald System.

Instant access across the entire enterprise

Emerald makes your migration painless, enabling you to scale access infinitely and gradually across buildings, campuses, and the wide-area network, using your existing network infrastructure - with switching between sources at speeds of less than half a second.

Digital video at its best

Emerald is the first KVM platform that supports pixel-perfect 4K DisplayPort video at 60 Hz over standard IP network switches. Image transmission with mathematical lossless compression visualizes every single pixel at 60 fps with 10-bit color depth.

If you're not ready for 4K, start with the Emerald 2K options, supporting one or two full HD DVI channels, and migrate to 4K at your own pace by transitioning individual user groups when the need arises.


More and more physical servers are being replaced by virtualization, allowing better performance, availability, scalability, and return on investment. Emerald simplifies access to both physical and virtual servers with virtual machine support for VMware, Microsoft, and Citrix, using RDP 8.1, RemoteFX, and PCoIP, among others.

Fail-safe operation

All Emerald transmitters and receivers feature copper or fiber connectivity through one (HD) or two (4K) flexible SFP+ slots.

Your 24/7 operation requires network resilience. Use the redundant network ports on the Emerald units to provide continuous, uninterrupted operation even if one network link experiences loss-of-service. Connect the endpoints either through two alternative direct links, a direct link, and a network connection or two independent networks.

General Information

ManufacturerBlack Box Corporation

Manufacturer Part NumberEMS10G28

Manufacturer Website Address

Brand NameBlack Box

Product LineEmerald

Product Name10-Gigabit Ethernet Network Switch, 28-Port

Product ConditionNew

Packaged Quantity1

Product TypeEthernet Switch

Technical Information



Port/Expansion Slot Details28 x 10 Gigabit Ethernet Expansion Slot, 2 x 100 Gigabit Ethernet Expansion Slot

Media & Performance

Media Type SupportedOptical Fiber

Ethernet Technology10 Gigabit Ethernet, 100 Gigabit Ethernet

Network Technology10GBase-X, 100GBase-X

I/O Expansions

Number of Total Expansion Slots30

Expansion Slot TypeSFP+, QSFP28

Number of SFP+ Slots28

Network & Communication

Layer Supported3

Management & Protocols


Power Description

Input Voltage120 V AC, 230 V AC
Frequency50 Hz, 60 Hz

Power SourcePower Supply

Redundant Power Supply SupportedYes

Physical Characteristics

Compatible Rack Unit1U

Form FactorRack-mountable




Weight (Approximate)19.66 lb


Package Contents
  • 10-Gigabit Ethernet Network Switch, 28-Port
  • 2 x Power Supplies
  • 4 x Fans
  • Rackmount Kit

Environmentally FriendlyYes

Environmental CertificationRoHS

Country of OriginChina


Limited Warranty2 Year

Customer Reviews