AT-UHD-CLSO-612 ***Discontinued***

• • • Discontinued • • •

Model Number: AT-UHD-CLSO-612

  • Two HDBaseT inputs
  • Two HDMI inputs
  • Two multi-function analog inputs on 15-pin HD connectors
  • Mirrored, dual outputs on HDBaseT and HDMI
  • 4K/UHD @ 30 Hz capability
  • Built-in 4K scaler
  • AV and control over HDBaseT
  • Power over category cable for remote-powered HDBaseT receiver


4K/UHD 6-Input Multi-Format Switcher with HDBaseT Inputs, Mirrored HDMI and HDBaseT Outputs, and Auto Switching

4K/UHD 6-Input Multi-Format Switcher

The Atlona AT-UHD-CLSO-612 is an advanced six-input, multi-format switcher with built-in 4K scaling and mirrored HDBaseT™ and HDMI outputs. It simplifies classroom and small office system integration by providing two HDBaseT inputs, two HDMI inputs, and two multi-function analog inputs. Professional audio features such as a microphone input with 48 volt phantom power and ducking are also included, allowing the switcher to address a wide array of AV switching and processing needs often encountered in classrooms, conference rooms, boardrooms, training rooms, and other presentation settings.

Configured and Managed by AMS

The AT-UHD-CLSO-612 also supports the Atlona Management System (AMS), a powerful network software platform that integrates product configuration, management and updating. Specially designed for IP-controllable Atlona Products, the Atlona Management System reduces installation time and enables remote monitoring and support. To learn more please visit AT-SW-AMS.


Two HDBaseT inputs

  • Works with Atlona HDTX and HDVS series transmitters for placement at remote sources near lecterns, conference tables, and instructor’s desks up to 230 feet (70 meters) from the switcher
  • Simplifies integration of remote sources by eliminating power supplies when used with PoCc-powered transmitters; single category cable carries AV signals, control and power

Two HDMI inputs

  • Digital inputs to support two DVI, HDMI or DisplayPort Sources
  • Works with PCs, Blu-ray players, document cameras, teleconference systems, wireless solutions with industry standard digital audio/video outputs

Two multi-function analog inputs on 15-pin HD connectors

  • Accepts RGBHV, component, S-video, or composite signals using common adaptors and break out cables
  • Provides input options for legacy analog sources

Mirrored, dual outputs on HDBaseT and HDMI

  • Supports dual display applications with both local and extended distance displays up to 230 feet (70 meters); designed to work directly with HDBaseT-capable displays and Atlona HDRX-RSNET series receivers
  • Eliminates cost associated with extra distribution and extension components; simplifies installation.  HDMI output allows additional HDBaseT transmitter for dual long distance applications.

4K/UHD @ 30 Hz capability

  • Compatible with Ultra High Definition sources and displays
  • Supports high resolution applications such as CAD, desktop publishing, and detailed financial reporting

Built-in 4K scaler

  • Scales to and from most resolutions up to 4K to optimize content from any source to any monitor or projector up to 4K; Down-scaling allows 4K sources to be displayed at 1080p or less
  • Eliminates the need for external scaling components

AV and control over HDBaseT

  • Delivers 4K/UHD video, audio, and control through a single cable
  • Eliminates multiple cable runs between source, control system, and display

Power over category cable for remote-powered HDBaseT receiver

  • Provides remote power to Atlona HDTX, HDRX, and HDVS series of transmitters and receivers over the same category cable used for AV and control signals
  • Eliminates local AC outlet required for extender device, cleans up the installation behind displays, plus saves time and integration costs


  • Selects last connected HDMI or VGA source
  • Reduces complexity or eliminates control system completely

TCP/IP, RS-232, and IR control

  • Compatibility with third-party control systems provides flexible control options
  • Reduces integration time and costs

EDID management

  • Manages EDID communications between source and switcher; allows integrators to force sources to preferred resolution
  • Ensures desired audio formats and video resolutions are provided to the AV system; eliminates the need for EDID management device

HDCP management

  • Allows non-protected material from PCs to pass to non-compliant displays and teleconference systems while protected content is not transmitted
  • HDCP compliance can be switched on/off from control systems for use with non-compliant displays, streaming devices, and codecs

Balanced line/mic input with 48V phantom power

  • Provides professional audio input for wired and wireless microphones
  • Saves installation costs by eliminating external audio mixer

Microphone ducking with advanced controls

  • Automatically reduces program audio levels when mic is used
  • Ensures optimized voice-over performance

Audio de-embedding

  • De-embeds PCM audio from HDMI inputs to analog audio output
  • Provides audio signal routing to sound system

Independent audio input switching

  • Switches analog audio inputs separately from video sources; allows analog audio signal embedding for DVI sources
  • Simplifies audio signal management from DVI sources

Balanced, stereo audio output on 6-pin captive screw connector

  • Interfaces with analog commercial sound systems
  • Maintains proper audio gain structure; eliminates adaptors

Adjustable volume and EQ

  • Features independent gain control for each input, master audio level control, bass and treble EQ adjustment
  • Optimizes audio signals eliminating the need for an external mixer

Front panel volume and mute controls

  • Volume Up and Volume Down buttons adjust output level to sound system
  • Provides quick level adjustment for operators

Easy, GUI-based configuration using integrated web server

  • Offers menu-based configuration of network settings, RS-232 settings, input switching, EDID and HDCP management and audio
  • Allows fast configuration of internal product settings and troubleshooting from a tablet, smart phone or PC in the field

 IP to RS-232 translation

  • Converts TCP/IP commands to RS-232 commands for output to external devices
  • Enables single IP connection to control processor to control both IP and RS-232 connected devices.  Faster installation

Six IR I/O ports

  • Multiple IR ports to control other devices in the system
  • Reduces cost associated with complex control processors

RS-232 and IR HDBaseT insertion

  • Adds control signals to the HDBaseT transmission including RS-232 and bi-directional IR
  • Simplifies display control from third-party control systems

Rack mountable 1U, full rack width enclosure

  • Installs easily in rack mounted systems with included 19” rack and wall mount brackets
  • Reduces installation time and cost

Included accessories

  • User guide, desktop power supply, detachable power cable, IR hand held remote control, rack mount bracket kit

Award-winning 10 year limited product warranty

  • Ensures long-term product reliability and performance in residential and commercial systems
  • Specify, purchase, and install with confidence

The Switcher for Classrooms and Small Offices

The AT-UHD-CLSO-612 eliminates the need for multiple components and simplifies the important steps in getting content from any source to whatever display and audio system the customer is using, including 4K monitors or projectors.  The switcher addresses customers’ needs to provide inputs on lecterns, conference tables, and locations distant from the switcher.  The AT-UHD-CLSO-612 utilizes Atlona’s exclusive Power over Category Cable (PoCc) technology to power remote HDBaseT transmitters and receivers.  Combining multiple components to address each process – scaling, converting, and delivering the signal to the display – into a single solution reduces system complexity and cost and increases reliability.

The AT-UHD-CLSO-612 is ideal for use in classrooms, training environments, large huddle spaces, and small meeting room applications where system requirements include:

  • A variety of analog and digital sources located at a distance from the central equipment rack and near the switcher
  • A confidence monitor for the main presentation
  • Long distance signal transmission to a projector or other display
  • 4K/UHD up- or down-scaling


What is Auto-Switching and why is it Important to my Application?


CLSO-612: Setting up Mic Ducking


CLSO-612: RS232 Control


CLSO – Connecting to the WebGUI and Menu Overview


CLSO Features and Benefits


CLSO Making it Work

Video Resolutions
IN 480i, 480p, 576i, 576p, 720p@25/29.97/30/50/59.94/60Hz, 1080i, 1080p, 2048x1080p, 3840×2160@24/25/30Hz, 4096×2160@24/25/30Hz 
800×600, 1024×768, 1280×768, 1280×800, 1280×1024, 1360×768, 1366×768, 1440×900, 1600×1200, 1680×1050, 1920×1200
OUT 480p, 720p@59.94/60Hz, 1080i, 1080p, 2048x1080p, 3840×2160@24/25/30Hz, 4096×2160@24/25/30Hz 
800×600, 1024×768, 1280×768, 1280×800, 1280×1024, 1360×768, 1366×768, 1680×1050, 1920×1200
Composite/S-Video NTSC, NTSC4, PAL, PAL-M, PAL-N, SECAM
Analog Output PCM 2Ch (de-embedded)
HDMI/HDBaseT Output PCM 2Ch
HDMI up to 10 meters up to 30 feet
CAT5e/6 up to 35 meters (@1080p3D / 4K) up to 115 feet
CAT6a/7 up to 40 meters (@1080p3D / 4K) up to 130 feet
CAT5e/6 up to 60 meters (@1080p 36bpp) up to 197 feet
CAT6a/7 up to 70 meters (@1080p 36bpp) up to 230 feet
Bandwidth 10.2 Gbps
HDCP Switchable – Compliant / Non complaint
Operating 0°C to 50°C 32°F to 122°F
Storage -20°C to 60°C -4°F to 140°F
Humidity 20 to 90% non-condensing
Consumption 55W
Idle Consumption 9.3W
Supply Input: AC100~240V 50/60Hz
Output: DC 24V/2.7A
H x W x D 44 x 433.8 x 255 (mm) 1.73 x 17.08 x 10.04 (inch)
W/feet 55.15 x 433.8 x 255 (mm) 2.17 x 17.08 x 10.04 (inch)
Rack Unit 1
Device 3.14kg 6.92lbs
Shipping 5kg 11.02lbs
Unit CE, FCC, RoHS
Power Supply CE, FCC, RoHS, cULus




pdf-icon Datasheets
pdf-icon Manual V.4 09/15
pdf-icon Tech Tips


pdf-icon AT-UHD-CLSO-612 FAQ


pdf-icon Brochures

Diagrams, Drawings & CAD Files

cad-icon-(1) CAD Files

Declarations Of Conformity

pdf-icon Declarations Of Conformity

Related Products

AT-HDVS-TX-WP Atlona HDMI and VGA/Audio to HDBaseT Wall Plate
AT-HDVS-TX Atlona Dual HDMI and VGA/Audio to HDBaseT Switcher
AT-HDRX-RSNET Atlona HDBaseT RX Box for HDMI w/Ethernet, RS-232 and IR
AT-HDVS-TX-WP-UK Atlona HDMI and VGA/Audio to HDBaseT Wall Plate

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AT-UHD-CLSO-612 Firmware

Download Firmware version 1.0.60 and OSD firmware 1.1.00
File Size 1105 KB
Date 03.27.15 – Current supported operating systems for update are: Windows XP, Vista and 7 — Mac OS is not currently supported. * For Win8 there is a work around. Please see below for additional instructions.

Additional Instructions

Firmware 1.0.60 and OSD firmware 1.1.00

  • Added equalizer (Bass/Treble)
  • Added auto switch for HDMI, HDBaseT, and VGA. (Cannot be used with component, S-video or composite)
  • Ability to assign the analog audio inputs to the HDMI or HDBaseT inputs, replacing those audio signals
  • HDVS-TX/WP control page, allows for control of auto switching, VGA preferred timing selection
  • Added menu lock button from webGUI. Allows for input selection but front panel menu functionality is locked
  • Added separate preferred timing for VGA inputs
  • Added preferred timing resolutions of 1600×900, 2560×1440, and 3840×2160
  • Added ability to mute the audio stream of the HDMI and HDBaseT output, leaving only analog audio active

Bug Fixes

  • Underscan no longer causes video instability
  • Power cycling no longer reverts the switcher back to English
  • WebGUI scaling now switches resolutions correctly
  • iPad and iPhone adaptors no longer cause flashing when connected to an HDMI port

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Click below for Support details

AT-UHD-CLSO-612 ***Discontinued***