Product title

ADDERLink® XD522

One liner

The ADDERLink XD522 video extender transmits high resolution video and USB signals over a single cable from a dual head computer to one base console

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Product diagram
Product description

The high performance ADDERLink XD522 KVM (Keyboard, Video, Mouse) extender enables you to locate your critical computing hardware in a secure and temperature controlled environment away from the user work station whilst maintaining the same user desktop experience. It can transmit either two 1920x1200 @60Hz video streams or one higher resolution video stream (3840x2160 @30Hz or 2560x1600 @60Hz resolutions), digital audio (S/PDIF), analog audio, Hi-Speed USB2.0 and USB2.0 (full and low speed) over CATx cables.

Product specifications part 2

Cable Guidelines

Recommended cables are CAT7 shielded foiled twisted pairs:

Daetwyler 7702 Flexible patch cable

Daetwyler 7120 Bulk cable

Note: Distances are achieved using single lengths of trunk/bulk cable with two 3m CAT7a patch cables. For each additional break/patch connection reduce distance by 5m. Preferably patch cables should be of type CAT7a and less than 2m. Patch cables over 2m must be CAT7a


Operating Temperature: 0 to 40ºC / 32 to 104ºF

Storage Temperature: -20 to 70ºC / -4 to 158ºF

Humidity: 10% to 90% (non-condensing)

Altitude: 2,000m / 6,56 l ft


Mean time between failure (MTBF) 100,000 Hours. Calculated to Telecordia standard SR332 issue 4 march 2016 @55C

Computer Connections Transmitter (TX)

Display port x 2, Audio 3.5mm in, Audio 3.5mm out, USB type B x 2 , RS232 10p10c options port

Peripheral Connections Receiver (RX)

Display port ++ x 2, Audio 3.5mm in, Audio 3.5mm out, Headphone 3.5mm out, Microphone 3.5mm in, USB type A x 4, RS232 10p10c options port


Local Unit:

1U compact case, robust metal construction

198mm/7.92” (w), 44mm/1.76” (h), 120mm/4.8” (d)



2.5mm DC jack (power adapter included), 100-240V AC 50/60Hz, 0.8A, input to power adapter, 5VDC 20W output from power adapter

Product specifications part 1

Approvals / Compliance

  • CE

  • FCC

  • RCM

  • UL

Hardware Compatibility

Support for all computers with display port, USB, audio, RS232 - requirement dependent

Display Port Interface

The system supports a maximum of 3840x2180 @30Hz (8bit) or 2560x1600 @60Hz on a single monitor or 1920x1200 @60Hz (10 bit) Supports two monitors 1920 x1200 @60Hz (8 bit). The receiver unit can drive HDMI or DVI monitors with the use of the correct adapter. Content protection is not supported.

USB 2.0

Supports up to six USB2.0 devices (low or full speed). HID devices are supported on ports marked “A” and isochronous devices (i.e. USB audio or video devices) on the Hi-Speed link only marked “B”.

Display Port Audio

The system delivers analog stereo audio (Line in, line out) & supports microphone input & headphones. It also delivers S/ PDIF (optical input) via a 3.5mm jack line in connector (mini Toslink). The display port audio path can have up to eight channels of 24-bit 192 kHz uncompressed “Pulse-code modulation”PCM audio or can encapsulate compressed audio formats in the audio stream. Supported compressed formats: DRA, Dolby™ MAT, DTS HD.


RS232 can be passed between the units to a maximum baud rate of 115K2 via the options port.

Software Compatibility:

All known operating systems

Product features part 1
  • Intelligent EDID Management: Extended Display Identification Data allows the true characteristics of the monitor to be passed back to the computer.

  • Plug and Play: The ADDERLink XD522 extender is delivered in a zero config state enabling true plug and play installation with no need for downloading of drivers or software

  • Display port audio and S/PDIF Support: via an optical 3.5mm jack socket (dual use with analog audio via mini Toslink)

  • HD Quality Analog Audio: stereo channel 24bit sampled at 96kHz available to transfer audio from local to remote for Line in / Line out. Microphone in and headphone use cases are also supported

  • Extension Distances: 150m (500ft) extension distance for a single 1920x1080 screen; 100m (330ft) extension distance for two 1920 x 1200 screens or a single high resolution screen to 2560 x 1600

  • Single High Dynamic Range Monitor Support: up to 2560 x 1600 @60Hz 10bit per color

  • USB 2.0 High Speed: for mass storage devices plus keyboard, mouse tablet and touch

Product categories
Product codes
Ordering information

XD522-DP-PAIR-XX: Pair including TX and RX units


Ready for translation
Product type
Product benefits
  • Uncompressed, high-resolution digital video and real-time control: every pixel of every frame sent with zero loss of data

  • Monitors which only support HDMI or DVI can be used: via DisplayPort Dual Mode (DP++) support

  • Single CATx cable for Cable Video, USB 2.0 (HID-only) and audio: adding a second CATx cable enables support for High Speed USB 2.0 extension

  • Extension distance: up to 150m (500ft)

  • Support for any USB human interface device: from mice and keyboards through to graphics tablets, jog shuttles, joysticks and 3D explorers, mass storage devices and isochronous devices such as webcams and headsets

Firmware updates
Product datasheets
3 Unique Identifiers
  • Ext. Distance: Up to 150m
  • Resolution: Up to 3840x2160@30Hz
  • Number of Screens: Up to 2


Product title


One liner

A high performance dual-head IP KVM matrix solution with support for 5K video and multigigabit Ethernet connectivity.

Part of the ADDERLink INFINITY 4000 Series.

Product description

The ADDERLink® INFINITY 4021 (ALIF4021) is the world’s first dual-head, 5K high performance IP KVM matrix over a single fiber.

Fully compatible with the existing ADDERLink INFINITY (ALIF) range, and supported by the ADDERLink INFINITY Manager (AIM), the ALIF4000 can be used as a point-to-point extender or easily integrated into a wider matrix system.

  • Dual-head 5K video, digital audio and Hi-Speed USB2.0 over a single link
  • Supports up to 10-bit per colour SDR and HDR10
  • Pixel-perfect image quality
  • Multi-channel digital audio via DisplayPort™
  • Adder's USB True Emulation for fast switching
  • Backwards compatible with all the existing ALIF range
  • Flexible and scalable
  • Full touch screen control with floating launch icon and on screen keyboard

Best of Show winnertvbscnProduct of the Year!Best of Show

Product specifications part 1
Video resolutions
  • Supports resolutions up to 5120x2880 including UHD or DCI and refresh rates up to 240Hz

  • Up to 10-bit per colour SDR and HDR10


  • Analog Line in/out 2 channel 16bit 48KHz 1V RMS in/1V RMS out
  • 2x DisplayPort™ Audio in either 2,6 or 8 channels linear PCM


  • 4 port of USB2.0 with Adder's USB True Emulation to support keyboard mouse and touch
  • One port of transparent Hi-Speed USB2.0
  • USB device seen as: 7 or 13 port hub


  • 2x 10,5,2.5 and 1GbE when using SFP-CATX-MR SFP
  • 2x 10GbE (no 10/100/1000 support on ber) via SFP
  • 2x 1GbE (no 10/100 support) via CATX ports


Local Unit - Transmitter (TX)

  • Computer: 2x DisplayPort™, 2x USB type B, 2x 3.5mm audio jack sockets, 1x DB9 socket
  • Ethernet: 2x 8p8c (RJ45), 2x SFP+ cages  
  • Power: 3 pin Kycon socket

Remote Unit - Receiver (RX)

  • Desk: 2x DisplayPort™, 5x USB type A, 2x 3.5mm audio jack sockets, 1x 3.5mm SPDIF socket
  • Ethernet: 2x 8p8c (RJ45), 2x SFP+ cages  
  • Power: 3 pin Kycon socket



  • (L)210mm/8.3" x (W)215mm/8.5" x (D)40mm/1.6"


  • Aluminum and steel construction


  • External power: 12VDC, 5A
  • Typical power consumption: 20W

Operating temperature

  • Operating temperature: 0 to 40oC/32 to 104oF
  • Storage temperature: 0 to 40oC/32 to 104oF
  • Storage and operating relative humidity: 10-90% non-condensing
  • Altitude: <2000m

Packing Box

  • Dimensions: (L)285mm/11.2" x (W)245mm/9.6" x (D)145mm/5.7"
  • Weight 2.5kg/5.5lb

Cable type recommendations

  • ALIF4021T 159,000 hrs
  • ALIF4021R 165,000 hrs
  • Telcordia SR332 Issue 4 March 2016 Calculated @55oC

Cable length rules

  • See manual

Cable type recommendations

  • See manual


  • CE and FCC: See the compliance web page for the full list
Product features part 1

Dual-head 5K screens over a single link
The ADDERLink® INFINITY 4021 (ALIF4021) can deliver two 5K screens over a single link

10-bit per colour and HDR10
Allows greater color depth, supports both SDR10 and HDR10

Multigigabit Ethernet support
Multirate (1/2.5/5/10) GbE support enables premium video performance over standard CAT6 cable up to 100m

Support for 1GbE
Integrated 1GbE ports enable easy delivery of 4K to 5K video over ubiquitous 1Gb/s copper links using 100m of standard CAT5e or CAT6 cable 

Enhanced resiliency
Dual-multirate or 1GbE ports can be teamed together for enhanced resiliency or improved video capability

Support for 5K resolutions
5K video resolutions supported for high resolution and ultra-wide video applications (5120x1440 @60Hz or 5120x2880 @30Hz)

High frame rate support
Refresh rates up to 240Hz supported for HD video resolutions

High speed USB2.0
Supports transparent USB communication up to 480Mbps for those using mass storage devices, mouse and keyboard, graphics tablets, jog shuttles, joysticks and 3D explorers

Perfect digital audio
Using the same encoding system as the other products in the ADDERLink INFINITY (ALIF) range, the digital video is spatially lossless, with 1:1 pixel mapping, ensuring that the digital video you receive is the same as the one leaving your remote computer
Backwards compatibility
The ALIF4000 can integrate seamlessly into your existing ADDERLink INFINITY® setup, replacing or working in conjunction with your existing ALIF endpoints

Isochronous Communication
Plug and play support for USB devices and third-party tools, such as Blackmagic Design DaVinci Resolve Color Grading Panels

Audio capability
Multi-channel digital audio, via DisplayPort™, provides a high-quality immersive sound experience.

Onboard diagnostics tool
Diagnostics tool maximizes uptime and assists with technical support enquiries by allowing the customer to troubleshoot network issues directly from the unit.

Flexible and scalable
Each ALIF4021 unit can be configured as a simple extender or distributed KVM switch. Each receiver can see up to 16 sources or can be connected to the ADDERLink INFINITY Manager (AIM) to create a larger and more fully featured matrix.

Product codes
Product brochures
What's in the box

ALIF4021R-XX: ALIF4021 Receiver

  • 1x PSU cable
  • 1x IEC cable

ALIF4021T-XX: ALIF4021 Transmitter

  • 2x 2m/6.5ft DisplayPort cable
  • 1x 2m/6.5ft USB cable.
  • 2x 2m/6.5ft Audio cables.
  • 1x PSU and IEC lead
Ordering information

ALIF4021T-XX: ALIF4021 Transmitter 

ALIF4021R-XX: ALIF4021 Receiver

Ready for translation
3 Unique Identifiers
  • Ext Distance: Unlimited over IP/100m over CATx/10km over fiber
  • Number of Screens: Up to 2
  • Resolutions: Supports resolutions up to 5120x2880 (5K) including UHD or DCI