Home Adder ADDERLink XD642
A high-resolution dual-head KVM extender. Ultra-high definition 4K60 video, USB2.0 and audio are transmitted on a single CATx or fiber cable.
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Region Availability-United States

This product can be purchased by US Customers

USA payment options - All Major Credits Cards and Paypal.

Financing options available for US customers only.

The ADDERLink XD642 is a high performance KVMA (Keyboard, Video, Mouse and Audio) extender that is designed to provide reliable and real-time access to critical computers – regardless of the location, whilst maintaining the same user desktop experience.


Developed for enterprise organizations and high-pressure control rooms, it combines the simplicity of true plug and play and high performance 4K KVM extension; resulting in superior functionality and flexibility in a cost-effective, reliable and straightforward solution.


Dual-head 4K60 video, USB2.0 and audio

Point-to-point protocol for ultra-low latency.

Flexibility between copper and fiber connectivity.

Adder’s USB emulation ensures reliable computer bootup.


Product Features

High-resolution video, real-time control

The system supports resolutions up to 4096x2160 @ 60Hz using 8 bits per color and 4:4:4 chroma sampling.


Single cable

Video, audio, USB HID (human interface device), hi-speed transparent USB and RS232 signals are transmitted over a single CATx or fiber cable.


Up to 4km/2.5 mile extension distances  

The ADDERLink XD642 supports both copper and fiber interfaces. It provides a range of up to 100m over a CAT6 cable link, and up to 4km over an optical fiber link.


Emulated USB2.0

Enables connection of any full and low speed USB HID from mouse and keyboards through to graphics tablets and joysticks.


Transparent USB2.0

Mass storage devices and isochronous devices, such as webcams and audio headsets can be used through the transparent USB2.0 hi-speed port.


EDID management

The system has intelligent EDID management to allow the true characteristics of the monitor to be passed back to the computer.


Plug and Play

The ADDERLink XD642 extender is delivered in a zero config. state so it works, without the need for drivers or software, as soon as it is connected.


Digital audio

Video: Encapsulates up to eight channels of 24-bit, 192kHz sampled “Pulse-code modulation” PCM uncompressed audio integrated with video signal. 

USB: Up to two channels of 24-bit, 96kHz sampled PCM audio.


HD quality analog audio

HD audio quality (stereo audio, 24-bit sampled at 96kHz) is available for line in/out, microphone and headphone or speakers.


Serial communications 

RS232 can be passed between the units to a maximum baud rate 115K2 with RTS/CTS flow control.


Video resolutions

The system supports resolutions up to 4096x2160 @ 60Hz

Software compatibility


All known operating systems. No drivers required.

Extension technology


5Gb/s CATx or 10Gb/s fiber with ultra low latency adaptivevideo stream compression.


Local unit - Transmitter (TX)


4 x Tri-color status LEDs

2 x DisplayPort in

1 x USB2.0 Type B for HID

1 x USB2.0 Type B for hi speed

Line in and out analog audio

RJ12 serial port

RJ45 and SFP+ ports

Remote unit - Receiver (RX)


4 x Tri-color status LEDs

2 x DisplayPort out

3 x USB2.0 full speed Type A

1 x USB2.0 transparent hi-speed Type A

Mic in, headset and speaker out

RJ12 serial port

RJ45 and SFP ports

Physical Design

Robust metal construction


TX and RX: 186mm/7.32 (w), 39mm/1.54 (h), 148mm/5.83 (d)

TX: 1.29kg/2.84lbsRX: 1.24kg/2.73lbs

Power supply


100-240 VAC, 47/63Hz

12 VDC 18W output from power supply unit

Operating temperature

0C to 40C/32F to 104F

Storage temperature


-10C to 50C/14F to 122F



0% to 80% (non-condensing)




Extension Distance




SM (Single-Mode Fiber)

MM (Multi-Mode Fiber)

CAT6 is recommended for CATx extensions. CATx extensions arelimited to 2 patch connections.  Patchcables should be CAT6 or better.

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