Black Box ACX1T-11-SM Compact KVM Extender Transmitter

Overview

The Black Box ACX1T-11-SM is a compact KVM extender transmitter designed for single-monitor DVI-D deployments where the operator console needs to be separated from a remote computer or server — without compromising video fidelity or USB peripheral response. It handles one DVI-D video channel, two USB-HID ports, and delivers connectivity over a 1G link via a single SFP port, making it a fiber-ready solution for installations where copper alone won't cover the required distance or where electrical isolation between endpoints is a priority.

This transmitter is the local-end (operator-side) unit in a paired KVM extender system. It is intended to be used alongside a compatible Black Box KVM extender receiver unit — the transmitter sits at the user's workstation while the receiver connects at the target machine. Separations of this type are common in broadcast control rooms, secure operations centers, industrial control environments, and data center KVM-over-IP consolidation projects where the compute hardware must be physically isolated from the operator workspace.

Key Features

• DVI-D Single-Monitor Video: Carries a full digital DVI-D signal — no analog conversion, no quality loss at the operator end. If your display and source are both DVI-D native, you avoid the signal degradation that comes with HDMI or VGA adapter chains.
• Dual USB-HID Ports: Two dedicated USB-HID connections support a keyboard and mouse simultaneously at the transmitter end. HID-class USB keeps latency predictable and avoids the compatibility headaches that come with generic USB 2.0 extension — critical when operators need responsive cursor control during time-sensitive tasks.
• 1G Network Interface with SFP Port: The single SFP slot gives you the flexibility to choose your fiber type — multimode or single-mode — based on the distance your run requires. Gigabit throughput over fiber also means the extension link is electrically isolated end-to-end, which matters in environments with ground loop interference, high EMI, or strict physical security separation requirements.
• Compact Form Factor: The ACX1T-11-SM is sized for tight operator desk installations or under-desk mounting where rack space isn't available. Compact extender transmitters in this class typically integrate into custom millwork, AV furniture, or beneath sit-stand desks without requiring a dedicated enclosure shelf.
• Fiber-Ready Architecture: SFP-based fiber links are inherently immune to the length limitations of copper USB or HDMI extenders and resist electromagnetic interference from industrial equipment, UPS units, and high-voltage cabling — relevant in manufacturing, energy, and broadcast environments where copper-based KVM extenders frequently underperform.

Integration and Compatibility

The ACX1T-11-SM (often searched as ACX1T 11 SM) is part of Black Box's ACX KVM extender family. As a transmitter-only SKU, it requires a compatible Black Box ACX receiver unit to complete the extension pair — verify receiver compatibility with Black Box's KVM extender line before ordering. The SFP port accepts standard SFP fiber transceivers; consult the Black Box SFP compatibility list for validated modules. For environments running KVM switches and extenders in matrix configurations, confirm that the receiver-side unit supports the switching fabric you intend to deploy.

DVI-D connectivity is natively compatible with most workstation-class GPUs and professional display controllers. If your display or source uses DisplayPort or HDMI, a passive or active adapter will be required upstream of the ACX1T-11-SM — factor that into your KVM accessories BOM. USB-HID support covers standard keyboards and mice; high-bandwidth USB peripherals (storage, audio, webcams) are not in scope for HID-class extension.

Frequently Asked Questions

Q: Does the ACX1T-11-SM work as a standalone unit?

A: No. The ACX1T-11-SM is the transmitter (local/operator) half of a KVM extender pair. It requires a compatible Black Box ACX receiver unit at the remote (computer) end to function.

Q: What type of fiber does the SFP port on the ACX1T-11-SM support?

A: The SFP slot accepts standard small form-factor pluggable transceivers. The fiber type — multimode or single-mode — depends on the SFP module you install. Consult Black Box's validated SFP compatibility list for confirmed modules.

Q: How many monitors does the ACX1T-11-SM support?

A: The ACX1T-11-SM supports a single monitor via one DVI-D output. It is a single-monitor transmitter and does not support dual-head or multi-display configurations in the same unit.

Q: Can I use the ACX1T-11-SM with an HDMI display?

A: The ACX1T-11-SM outputs DVI-D natively. An HDMI display can be connected using a passive DVI-D-to-HDMI adapter, provided the display accepts DVI-D-equivalent HDMI signals. Verify your display's input specifications before using an adapter.

Q: What USB peripherals are supported by the ACX1T-11-SM's USB-HID ports?

A: The two USB ports are HID-class, designed for keyboards and mice. High-bandwidth USB devices such as storage drives, webcams, or audio interfaces are not supported through the HID extension path.

Q: Is the ACX1T-11-SM compatible with KVM matrix switches?

A: Compatibility with matrix switching fabrics depends on the receiver unit and matrix platform. Confirm with Black Box's compatibility documentation that your receiver and matrix switch support ACX1T-series transmitters before deploying in a matrix configuration.

Ted Perry

The ACX1T-11-SM's SFP-based 1G link is the detail that makes this transmitter worth specifying over copper-only alternatives in electrically noisy environments. When I deploy KVM extenders in broadcast control rooms or industrial SCADA spaces, fiber isolation between the operator console and the compute rack isn't optional — it's the only way to eliminate ground loop artifacts and EMI-induced video corruption that copper-based extenders suffer from in those environments.

Technical Highlights:

• DVI-D Native Video: Full digital signal path from source to operator display — no analog stage, no conversion loss. For CAD workstations and broadcast preview monitors where pixel-accurate output matters, this is the right interface to specify.
• Dual USB-HID (2 ports): Simultaneous keyboard and mouse extension over the same fiber link. HID-class keeps the latency floor low and avoids the USB enumeration failures that plague generic USB-over-IP extenders under load.
• 1G SFP Port: Module-agnostic fiber interface — drop in a multimode SFP for shorter campus runs or a single-mode module when you need to cross building boundaries. The gigabit headroom keeps DVI-D video transport well within bandwidth budget.

Deployment Considerations:

• This is a transmitter-only unit — budget for the matching Black Box ACX receiver SKU. Mismatched transmitter/receiver pairs in the ACX family can result in no link or degraded video, so confirm the receiver model before finalizing the BOM.
• USB-HID class only: if your operator workstation needs to extend a USB audio interface, touch panel, or storage device alongside the keyboard and mouse, you'll need a separate USB extension path — the ACX1T-11-SM's USB ports won't carry those device classes.

The ACX1T-11-SM is the right transmitter for secure operations centers and broadcast control rooms where the compute hardware is rack-mounted in a locked equipment room and operators need a low-latency, fiber-isolated DVI-D console up to the distance your SFP module supports — without running copper between zones with different electrical potentials.