Vertiv HMX8000T-400 Dual-Head 4K DisplayPort IP KVM Transmitter

The Vertiv HMX8000T-400 is a dual-head 4K DisplayPort IP KVM transmitter designed for organizations that need to extend, switch, and matrix high-fidelity keyboard, video, and mouse signals across a standard 10GbE fiber IP network — without the distance constraints of traditional analog extenders. If you're building a centralized control room, a broadcast operations center, or a secure server enclosure environment where operators need pixel-perfect 4K output on two displays simultaneously, this transmitter is the source-side component that makes it work. Receiver units are purchased separately and pair with the HMX8000T-400 over your existing fiber infrastructure.

Overview

The HMX8000T-400 sits at the workstation or server end of a Vertiv Avocent HMX8000 KVM-over-IP deployment. It captures dual DisplayPort video at full 4K resolution, along with USB 2.0 and audio, then encodes and transmits that signal over a 10GbE fiber network to one or more paired receiver units. Because the system uses a standard IP network rather than proprietary CATx cabling, you're not fighting a 100-meter distance ceiling — the signal travels as far as your fiber runs. That's the practical difference for control rooms fed by distant server rooms, or multi-building campus deployments where equipment is centralized for physical security but operators are distributed.

Explore the full Vertiv KVM and infrastructure catalog to see compatible receivers, switches, and management appliances in the HMX8000 family.

Key Features

• Dual-Head 4K DisplayPort Output: Delivers pixel-perfect 4K resolution across two independent DisplayPort outputs simultaneously. For operators running dual-monitor workstations — think security operations centers, broadcast desks, or trading floors — this means no compromise: both screens render at full native resolution without downscaling or splitting a single feed.
• 10GbE Fiber Network Transport: The 10GbE fiber backbone handles 4K dual-head signals without compression artifacts or perceptible latency. Unlike CATx-based extenders capped at 100m, KVM over IP over fiber scales to your campus topology — same-building or cross-campus, the distance is a network design question, not a hardware limit.
• Sub-Second Source Switching: Switching between target computers takes less than a second. In a matrix environment where operators need to jump between multiple systems quickly — incident response, multi-system monitoring — that switching speed is operationally significant. A two-second black screen on every switch adds up fast across a shift.
• Any-to-Any Matrix Configuration: The HMX8000T-400 supports any-to-any matrix switching, meaning any operator (receiver) can connect to any source (transmitter) on the same network fabric. Up to 16 transmitter sources can be aggregated, giving you a scalable matrix without a dedicated hardware switch in the signal path.
• 1:1 Pixel Mapping with Multicast: Multicast capability combined with 1:1 pixel mapping means multiple receiver endpoints can simultaneously view the same source — useful for training environments, supervisory oversight, or redundant monitoring stations — without degrading image quality at any endpoint.
• AES 256-bit + RSA 2048-bit Encryption: All KVM traffic traversing the IP network is protected by AES 256-bit encryption with RSA 2048-bit key exchange. For deployments in government facilities, financial operations, or healthcare data centers where signal interception is a compliance concern, this encryption stack meets standard enterprise security requirements without requiring a separate encryption appliance.
• USB 2.0 Support: USB 2.0 pass-through handles the majority of HID peripherals — keyboards, mice, smart card readers, and most input devices — without requiring additional adapters. Note that USB 3.0 and isochronous devices (webcams, audio interfaces) are outside the USB 2.0 envelope.
• IP-Based Architecture Eliminates Distance Limits: Traditional KVM extenders are bounded by physics — CATx runs out at 100m, fiber-direct solutions require dedicated cabling. The HMX8000T-400's IP-based design means your existing managed 10GbE network infrastructure becomes the extension medium. No new point-to-point cabling runs required if the network already reaches both locations.

Integration and Compatibility

The HMX8000T-400 is the transmitter unit in the Vertiv Avocent HMX8000 platform. It requires a compatible HMX8000 receiver unit at the operator end — receivers are sold separately. The system operates over standard 10GbE Ethernet with fiber connectivity, integrating into existing managed switch fabrics without proprietary network hardware. VLAN segmentation of KVM traffic is a common deployment practice to isolate the KVM network from general data traffic. For centralized management of multiple HMX8000 transmitter and receiver pairs, Vertiv's Avocent IP management software provides a single-pane view of connected sources and sessions. Review KVM switch and matrix options if you need hardware-layer switching in addition to IP-based matrix capability.

For large-scale deployments planning to connect multiple HMX8000T-400 units, plan your 10GbE switch port budget carefully — each active transmitter consumes one 10GbE port, and multicast sessions require IGMP snooping enabled on the switch fabric to prevent multicast flooding. Consult your network planning resources for PoE and bandwidth budgeting across high-density KVM-over-IP environments.

Frequently Asked Questions

Q: Does the HMX8000T-400 require a proprietary network or will it work on my existing managed 10GbE switches?

A: The HMX8000T-400 operates over a standard 10GbE IP network. No proprietary switching hardware is required. For multicast sessions, ensure IGMP snooping is enabled on your managed switches to control multicast traffic distribution.

Q: Is the receiver included with the HMX8000T-400?

A: No. The HMX8000T-400 is the transmitter unit only. Receiver units in the Vertiv Avocent HMX8000 family are purchased separately and must be paired to complete the KVM-over-IP link.

Q: How many sources can be connected in a matrix using the HMX8000T-400?

A: The HMX8000 platform supports up to 16 transmitter sources in a matrix configuration, enabling any-to-any switching across all connected operators and sources on the network.

Q: What encryption does the HMX8000T-400 use to protect KVM signals over the network?

A: KVM traffic is encrypted with AES 256-bit encryption and RSA 2048-bit key exchange, meeting standard enterprise and government security requirements for in-transit data protection.

Q: Can multiple operators view the same source simultaneously with the HMX8000T-400?

A: Yes. The system supports multicast with 1:1 pixel mapping, allowing multiple receiver endpoints to connect to the same transmitter source simultaneously without degrading video quality at any endpoint.

Q: What USB devices are supported through the HMX8000T-400?

A: The HMX8000T-400 supports USB 2.0 devices — keyboards, mice, smart card readers, and most standard HID peripherals. USB 3.0 devices and isochronous USB devices such as webcams are not within the USB 2.0 pass-through specification.

James Everett

The HMX8000T-400 is one of the few IP KVM transmitters I'd recommend without qualification for dual-monitor 4K control room builds — specifically because of the 1:1 pixel mapping over multicast. Most KVM-over-IP solutions at this resolution tier either force you to choose between single-head 4K or dual-head at reduced resolution. This unit delivers both simultaneously over a 10GbE fiber link, and that's a meaningful constraint lifted for broadcast and SOC environments where operators won't accept a downscaled signal on their second monitor.

Technical Highlights:

• AES 256-bit + RSA 2048-bit Encryption: The dual-layer encryption (AES for payload, RSA 2048 for key exchange) satisfies the security posture of most regulated environments without bolting on a separate encryption appliance — particularly relevant in government operations centers and financial trading floors where KVM signal interception is a real threat model.
• Sub-Second Switching Latency: Less than one second to switch between any of the up to 16 matrix sources. In a security operations center where an analyst might toggle between 8–10 different server sessions during an active incident, switching delay compounds quickly — this spec keeps it operationally invisible.
• 10GbE Fiber Transport: Running KVM traffic at 10Gbps over fiber means the signal path doesn't compete with general Ethernet congestion. In practice, segment your KVM VLAN with QoS priority on your managed switches and you get consistent sub-second performance regardless of general network load.

Deployment Considerations:

• Each HMX8000T-400 transmitter consumes one 10GbE SFP+ port on your switch fabric. Budget your port count before ordering — a 16-source matrix needs 16 dedicated 10GbE ports plus ports for the receiver side, so a single 24-port 10GbE switch is typically the minimum for a modest deployment.
• USB 2.0 is the ceiling here — if any of your operators need to pass USB 3.0 storage devices or webcams through the KVM link, this platform won't support it. Plan for that gap in the peripheral spec before committing to the HMX8000 platform.

For a broadcast master control room or a government SCIF environment where operators run dual 4K displays and need encrypted, latency-minimal access to centralized compute — the HMX8000T-400 (often searched as HMX8000T 400) is correctly spec'd. It's not the right fit for environments needing USB 3.0 peripheral pass-through or analog video inputs, but for pure DisplayPort 4K dual-head KVM over fiber, it's a well-defined solution to a specific architectural requirement.