Adder INFINITY 4K 60Hz KVM-Over-IP Dual DisplayPort Matrix Receiver


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Series: INFINITY 4000
Unit: ALIF4021R Receiver

ADDERLink Infinity ALIF4021R is a dual-head 4K DisplayPort, Audio and USB 2.0 IP Fiber KVM Receiver that is part of the Adder Infinity 4000 4K Digital Extension / Matrix KVM solution. ALIF4021R receiver requires at least one ALIF4021T receiver to operate.

The ALIF4000 delivers pixel-perfect, color accurate picture quality at 4K60 with USB2.0 with fast switching. Fully compatible with the existing ADDERLink INFINITY range, and supported by the trusted ADDERLink INFINITY Manager (AIM), the ALIF4000 can be used as a point-to-point extender or easily integrated into a wider matrix system; enabling KVM users to migrate to 4K without the need to rip and replace.

  • Dual-head 4K DisplayPort, audio and USB extender over a single fiber connection
  • Pixel-perfect, color accuracy at 4K@60Hz (DCI or UHD)
  • Flexible solution: from point-to-point extender to an infinitely extensible matrix used for IT administration or broadcast
  • Unlimited extension distances over fiber
  • USB 2.0 with Emulation and class control: for faster keyboard and mouse switching plus support for USB mass storage, tablet, touch and more
  • Bi-directional analog audio
  • Backwards compatible with existing ADDERLink INFINITY 1000 / 2000 infrastructure
  • 10GbE network support
  • Plug and Play

Adder ALIF4021R Features

  • Adder ALIF4021R Use Case

    Infinite Flexibility

    With the addition of AdderLink Infinity management system (A.I.M.), you can turn multiple point-to-point extenders into a truly scalable digital KVM matrix system that allows any workstation to link with any computer connected to the network.

    • Point-to-point extension (local / over-IP)
    • AV / KVM Switch multi-point matrix (over-IP)
    • Sharing a single target (over-IP)
    • Multicasting to many receivers (over-IP)
    • Command Center / Video Wall Controller (over-IP)

    Learn more

  • Adder ALIF4021R Pixel Perfect 4K @ 60Hz video, real time control

    Pixel Perfect 4K @ 60Hz video, real time control

    Uncompressed video extension at a maximum of 4K UHD (3840x2160) or 4K DCI / True Cinema 4K (4096x2160) with refresh rates to up to 60fps. Using a spatially-lossless encoding system, with 1:1 pixel mapping, ALIF4021R provides pixel perfect and color accurate video with no artefacts. The video you receive is the same as the video leaving the remote computer.

  • Adder ALIF4021R Multimode SFP Fiber Module

    Fiber IP Network-based

    Leverage existing standard 10GbE networking infrastructure to extend or matrix your computing resources to your users! AdderLink Infinity 4K units can be used as point-to-point extenders over 10GbE fiber cable, or made into a flexible IP-based matrix using standard 10GbE fiber switches and the AIM Manager. Infinity 4K is the perfect solution for any application including for an office, campus, command center, video wall, editing studio, or as a digital signage solution.

  • Adder Extension Over IP Diagram

    Unlimited extension distances

    10GbE Fiber Optic fiber technology enables offers much greater extension distances over traditional CatX cables. Extension distance is also not limited to a single fiber cable length - If you need to extend further, simply add a 10GbE network device. This can be repeated many times for longer distances.

  • Adder ALIF4021R USB 2.0 with emulation and class control

    USB 2.0 with emulation and class control

    Enables connection of USB devices from mice & keyboards to touch screens, graphics tablets, jog shuttles, joysticks and 3D explorers, alongside mass storage devices. True USB Emulation Technology also allows for fast keyboard & mouse or touch switching. For applications where security is of high importance, the system can disable the use of non-HID devices, meaning there is no need to physically block USB ports to prevent the use of mass storage devices.

  • Adder ALIF4021R Enterprise-grade security

    Enterprise-grade security

    All Adder Infinity units have built-in security measures compliant with universal enterprise grade security standards inlcuding AES 256 bit encryption and RSA 2048 bit public key authentication.

  • Adder ALIF4021R EDID Management - Ensure Perfect Match Between Source & Display

    Intelligent EDID management

    Intelligent EDID management allows the true characteristics of the monitor to be passed back to the computer. This ensures perfect video display without the additional configuration.

  • Adder ALIF4021R Redundant network

    Redundant network operation

    Adder ALIF4021R units are able to detect whether the network is in operation and can automatically change to its second network 10GbE SFP port if it detects a failure.

  • Adder INFINITY series

    Backwards compatible with existing Adder INFINITY series*

    Adder INFINITY 4000 is backwards compatible with other INFINITY series models. You can access any current INFINITY transmitter unit remotely from a 4000 receiver. Other INFINITY series receiver units cannot access the 4000 transmitters from outside the fiber network.

  • Adder ALIF4021R Plug and Play

    Plug and Play

    AdderLink Infinity 4K extender devices are delivered in a zero configuration state so you can plug them in and start working on them straight away. There is no need for drivers or software to be installed.

  • Adder ALIF4021R Rack Mounting (2) in 1U

    Rack mounting option

    Adder Infinity 4K units can be used at a desktop or be rack mounted two side-by-side in 1U with the optional RMK12 mounting kit. Additional kits for different mounting methods are also planned for the future release.

  • Video Thumbnail - Why is the Introducing the new ADDERLink INFINITY 4000 range

    Introducing Adder INFINITY 4000 Series

  • Video Thumbnail - Why is the ADDERLink INFINITY 4000 range for you?

    Why Choose Adder INFINITY Range?

  • Video Thumbnail - ISE: ADDERLink INFINITY 4000 range

    ISE Interview - Adder INFINITY 4000 Series

Adder ALIF4021R-US Package Contents

Whats Included? Adder ALIF4021R Package Contents

  • (1) ALIF4021R Receiver
  • (1) VSCD10 6ft DisplayPort cable
  • (1) VSC24 6ft USB 2.0 A-to-B Cable
  • (1) VSC22 6.6ft Audio cable (3.5mm stereo jacks)
  • (1) PSU-IEC-12VDC-5A Power adapter and US power cord
  • (4) Self-adhesive rubber feet
  • (1) Quick start guide and Safety document
  • (1) 2-Year Limited Warranty & Lifetime World Class Support

Adder ALIF4021R Specifications

1.6 in. (40 mm.)
8.5 in. (215 mm.)
8.3 in. (210 mm.)
1.8 lbs. (4 kg.)
Packing BoxDimensions: (L) 285mm /11.2-inch (W) 245mm/9.6inch (D) 145mm/5.7inch Weight: 2.5kg / 5.5lb
MaterialsAluminium and steel construction
Operating Temperature
0°C to 40°C (32°F to 104°F)
Storage Temperature
-10°C to 60°C (14°F to 140°F)
Storage and operating relative humidity
10-90% non-condensing
< 3000m
External power
12VDC, 5A
Typical power consumption
Supported Hardware
USB, Audio, RS232
Max video resolutionSupports 4K UHD or 4K DCI (True Cinema 4K) and refresh rates to 60Hz
USB4 ports of USB2.0 with USB True Emulation to support keyboard, mouse and touch.
USB device seen as: 7 or 13 port hub
AudioAnalog Line in/out 2 channel 16bit 48KHz 1V RMS in / 1V RMS out
Ethernet10GbE (No 10/100/1000 support)
Approved Agency
Receiver Connections
Desk: 2x DisplayPort, 5x USB type A, 2x 3.5mm audio jack sockets,
1x 3.5mm SPDIF socket.
Ethernet: 1x 8p8c (RJ45), 2x SFP+ cages.
Power: 3 pin Kycon socket.

This part is also known as Adder ALIF4021R-US, ALIF 4021R, ALIF-4021R, and Infinity 4000 Receiver.

Question: What 10GbE Switches are endorsed by Adder to run the InfinityLink 4000?
Answer: Thank you for your inquiry,

I have been speaking with Adder tech support, system test, and product management teams about the switch requirements. They say that every major switch manufacturer should have models that meet the requirements. System test were performed using HP 5700 FlexFabric JG896A and Hauwei CE6810-48S4Q switches in their lab. Provided the switch meets the requirements detailed in the "ALIF: Successful Implementation" post at and comes up with a "soft Yes" using this excel document calculators "10G" tab, the switch should work fine. The values that need to be entered into the calculator are usually found in the switch manufacturer's data sheet for the switch model.

  • Non-blocking switch
  • IP address and subnet mask configured for the VLAN that supports the Infinity network
  • IGMP Snooping enabled at the switch and VLAN level
  • IGMP Querier enabled on a 10 GbE switch, if there are 10GbE switches in the network (which there will be for 4K/60 :-)
  • Support for multiple multicast groups per port. Transmitters setup a separate multicast group for each video and the audio, so a dual-video transmitter can have three multicast groups
  • "spanning tree portfast" set on all ports that will host Infinity RXs, TXs, and managers
  • "switchport mode access" set on all ports that will host Infinity RXs, TXs, and managers
  • Jumbo frames enabled
  • The same IGMP version level needs to be running on the switch and the ADDERLink Infinity Manager (AIM). v2 or v3 is supported by the manager.

Please let us know if there is anything else we can help you with!