Two-input AV switcher with USB-C and HDMI inputs

Two-input AV switcher with USB-C and HDMI inputs

AT-OME-MH21

Two-input AV switcher with USB-C^® and HDMI^® inputs
USB-C input for AV and USB data (does not support device charging)
Integrated USB 3.0 hub
4K/UHD capability @ 60 Hz with 4:4:4 chroma sampling
Selectable 4K to 1080p downscaling
Automatic input selection and automatic display control
Audio de-embedding
Also available: AT-OME-MH21-CP with USB-C device charging up to 60 watts

NOTE: The AT-OME-MH21 has limited availability. The AT-OME-MH21-CP is the replacement product.

SKU: AT-OME-MH21 Categories: Single Output, HDMI to HDMI, HDMI, Scaler, HDR, Popular Products, Switchers Tags: 2, HDCP 2.2, IR/RS-232, ISE 2019, CEC, omega, Ethernet, USB hub only, Tradeshow, at-ome-mh21, 4K/UHD 10 Gbps, ome-mh21, 4K HDR 18 Gbps, RS-232, HDMI, Switchers, USB-C, HDMI/HDMI, HDMI only

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Simple collaboration and video conferencing hub

Meeting room with OME-MH21, CAP-FC110, and CAP-SP100

A compact switcher for small spaces and more.

A unique, two-input switcher design that can go anywhere, discreetly. The OME-MH21 is right-sized for small-group collaboration in huddle rooms or many other spaces.

Hands-free, zero UI operation.

Connect your device to the switcher, and watch the display power up and present your content. From there, you can disconnect your device and hand off to another presenter, or just walk away and the system shuts down the display.

Ready for remote collaboration and hybrid meetings.

Enhance collaboration and productivity with your preferred video conferencing platform. Use the built-in USB hub to connect your PC, a camera, and a speakerphone or soundbar.

Additional Features

The Atlona AT-OME-MH21 is a uniquely compact, versatile 2×1 switcher with USB-C and HDMI video inputs, HDMI output, and USB hub. The OME-MH21 is part of the Omega™ Series of integration products for modern AV communications and collaboration.

USB hub and switching

Add your camera and speakerphone or soundbar, and take advantage of the ability to switch between two host PCs.

Hands-free operation

Connect a laptop, and the OME-MH21 responds by selecting the appropriate input and powering up the display.

Audio de-embedding

The OME-MH21 can de-embed audio to feed directly into an amplifier, DSP, or dedicated sound system.

Automatic display control

Trigger display powering when connecting or disconnecting from the OME-MH21, via CEC, RS-232, IR, or TCP/IP.

See more technical details

Videos

Introducing the Omega OME-MH21 Two-Input Switcher

The Atlona AT-OME-MH21 is a two-input switcher with USB-C and HDMI video inputs, plus a USB 3.0 hub.

Setting up the OME-MH21 and OME-MH21-CP

Follow along with this video to learn how to set up and configure the OME-MH21 and OME-MH21-CP.

Details

The Atlona AT-OME-MH21 is a compact, versatile switcher with USB-C and HDMI inputs. It is equipped with features for complete AV integration in huddle rooms and small meeting spaces, including automatic switching and display control, audio de-embedding, and a USB 3.0 hub for video conferencing peripherals or touch displays. Part of the Omega™ Series of integration products for modern AV communications and collaboration, the OME-MH21 is HDCP 2.2 compliant and supports 4K HDR and 4K/60 4:4:4 at HDMI data rates up to 18 Gbps. Additionally, 4K downscaling to 1080p @ 60, 30, or 24 Hz is available when connected to an HD display. The OME-MH21 includes USB 3.0 and USB-C interfaces for two host PCs, plus two peripheral devices such as a camera, microphone, speakerphone, touch-enabled display, or keyboard and mouse.

USB for Video Conferencing with Zoom, Microsoft Teams, and More

The OME-MH21 features interfacing for host PCs and USB peripherals, making it ideal for video conferencing and UC (unified communications) platforms such as Zoom, Microsoft Teams, Cisco^® Webex^®, and GoToMeeting^®. Available from Atlona are the AT-CAP-FC110 ePTZ camera AT-HDVS-CAM PTZ camera.

Compact, Flexible Switcher with Integrated AV System Automation

The OME-MH21 combines the benefits of auto-switching, integrated display control, USB interfacing, and more. It incorporates many popular integration convenience features, while delivering excellent performance and value for 4K presentation and video conferencing applications. The USB-C input is ideal for AV interfacing with newer laptops and mobile devices, plus data connectivity to the USB hub. For additional integration convenience, the OME-MH21 features audio de-embedding and remote management with Velocity Device Manager.

Automatic Display Control

The OME-MH21 provides control to a display through IP, RS-232, IR, or CEC*, without the need for a separate control system. This simplifies system design and integration while reducing costs. With automatic display control, the OME-MH21 can trigger a display to power on automatically whenever a laptop or other device is connected. At the end of the presentation, when the presenter disconnects the laptop, the OME-MH21 forces the display to power off. Ease of presenter interaction with the system, and the savings incurred by automatic display shutdown provide a significant return on investment. The OME-MH21 display control capability can also be triggered by an external control system.

* Consumer Electronics Control (CEC): Atlona does not guarantee the function of CEC with all televisions. We can confirm proper operation with many current Samsung, Panasonic, Sony, and LG TVs. Many manufacturers do not support the CEC “off” command when sent from a source and older TVs use proprietary commands. Atlona only supports those TVs that follow CEC command structure from HDMI 1.2a and support the “off” command when issued by a source. We encourage any dealer to get evaluation product from Atlona prior to designing a system around this control technology or be prepared to use other methods to control their displays if Atlona CEC is not compatible with the installed displays.

Reliable Auto-Switching

The OME-MH21 can automatically select an input source based on detection of the 5 volt hot plug detect (HPD) signal, as well as active video. This ensures reliable auto-switching operation for all video sources, including DVRs, DisplayPort / Mini DisplayPort adapters, and other devices that always maintain the HPD line at the 5 volt “high” state but may not be delivering active video.

Applications

Huddle rooms and small meeting spaces – The OME-MH21 provides a compact, yet comprehensive and cost-effective integration solution. When installed below a meeting table, the available Pocket™ 3H (AT-PKT-3H) provides convenient tabletop AV and USB cable access for easy BYOD connectivity.
Video conferencing – This switcher provides interfacing with USB devices for soft codec conferencing, with video and USB switched together between two host PCs. The USB interfacing is also ideal for a touch-enabled display, enabling on-screen control of a PC.

Product compatibility

Please see below for a list of complementary integration products for the OME-MH21.

OME-MH21 Complementary Products

Product	Description
AT-CAP-FC110	Captivate™ 4K ePTZ Auto-Framing Camera
AT-CAP-SP100	Captivate™ USB / Bluetooth Speakerphone
AT-HDVS-CAM	PTZ Camera
AT-OCS-900N	Network-Enabled Occupancy Sensor
PKT-3H	Architectural Cable Access Enclosure for Three Cables
LC-H2H	LinkConnect HDMI to HDMI Cable
LC-MDP2H	LinkConnect Mini DisplayPort to HDMI Cable
AT-LC-UC2UC-2M	LinkConnect USB-C to USB-C Cable
Gain™ 60 (AT-GAIN-60)	Stereo / Mono Power Amplifier – 60 Watts
AT-PA100-G2	Stereo / Mono Power Amplifier – 40 Watts

Technical Features

Two-input AV switcher with USB-C and HDMI inputs

No need to provide an adapter for USB-C to HDMI video

USB-C input for AV and USB data (does not support device charging)

Provides compatibility with laptops and tablets with USB-C ports supporting AV output
Allows clutter-free, single cable connectivity to a PC for video conferencing and collaboration

Integrated USB 3.0 hub

USB type B interface for connection to a host PC, plus two USB type A ports for a peripheral device such as a microphone, speakerphone, camera, or touch display
USB-C input is also available for data connection to a host PC
Provides an ideal USB integration solution for software video conferencing and other applications

4K/UHD capability @ 60 Hz with 4:4:4 chroma sampling, plus support for HDR formats

Ideal for new and emerging 4K/UHD and HDR-capable sources and displays
Compatible with 4K HDR10 @ 60 Hz and Dolby Vision™ @ 60 Hz, as well as HLG (Hybrid Log-Gamma) for 60p HDR broadcast services

HDCP 2.2 compliant

Adheres to latest specification for High-bandwidth Digital Content Protection
Allows protected content stream to pass between authenticated devices

Selectable 4K to 1080p downscaling

Integrated video processing available for down-converting 4K/UHD @ 60, 30, or 24 Hz to 1080p
Downscaling can be bypassed to allow pass-through up to 4K/60 4:4:4 and 4K HDR
Ideal for applications with 1080p displays

Automatic display control

Automatically changes display power state based on active or standby mode of the switcher. Control signals to display are transmitted via IP, RS-232, IR, or CEC.
Embedded, comprehensive selection of display drivers from the Velocity™ System driver database
Enables display and volume control. CEC enables control of consumer displays (as supported by the display manufacturer).
Includes an adjustable lamp cooldown mode to avoid prematurely powering up a projector after shutdown
Enables effortless, automated system operation without the need for an external control system

Automatic input selection using hot plug detect and video detection technology

Selects active input when sources are connected or if there is a change in source power status
Enables simplified, automatic system operation without user intervention

Audio de-embedding

De-embeds two channel PCM audio and delivers to a balanced, analog audio output*
Provides direct interfacing into an external audio system
* Mute control is available for analog audio output (but not volume control).

Multi-channel audio compliant

Passes through multi-channel audio formats from the HDMI or USB-C inputs
Supports PCM, Dolby^® Digital, Dolby Digital Plus™, Dolby TrueHD, Dolby Atmos^®, DTS^® Digital Surround™, DTS-HD Master Audio™, and DTS:X^®

EDID management

Manages EDID communications with the source through a display’s EDID or internally stored EDID
Ensures desired audio formats and video resolutions are provided to the AV system

HDCP management

Automatically reports HDCP compliance status to the source based on the sink device
HDCP compliance can be disengaged through Velocity or other control system
Allows non-protected material from PCs to pass to non-compliant displays, streaming devices, and teleconference systems; protected content is not transmitted
Displays a green splash screen as visual confirmation that protected content is being blocked from transmission to a non-compliant display

Intuitive GUI-based configuration using integrated web server

Offers menu-based configuration of device settings including network access, input switching, signal processing, display control, HDCP and EDID management, and more
Allows fast configuration of internal product settings and troubleshooting from a mobile device or PC in the field

TCP/IP and RS-232 control

Flexible control options for compatibility with the Atlona Velocity™ control system, as well as other third-party control systems
Reduces integration time and costs

Easy to configure and manage with Velocity Device Manager

Centralized, network-based configuration and management of Atlona IP-controllable products and systems
Manage configuration and firmware updates for AV devices spanning a facility, building, enterprise, or residence
Available as a part of Velocity control systems or as a free virtual machine software download

Field-updatable firmware

Device can be updated in the field via the web GUI or Velocity Device Manager

Front panel power and signal status LEDs

LED indicators provide power and input selection status information

Low-profile, 1.02 inch (26 mm) high enclosure

Easy installation into confined spaces below tables and in furniture

Included accessories

Installation guide, surface mounting hardware, 2 meter (6.5 foot) USB-C male-to-male cable (USB 3.2 Gen 1), and external universal power supply

Product Warranty

To view the product warranty, use the following link: https://atlona.com/warranty/

Specifications


Video
Signal	Input – HDMI, USB-C Output – HDMI
Copy Protection	HDCP 2.2
Pixel Clock	600 MHz
UHD/HD/SD	4096×2160@60/50/30/25/24 Hz 3840×2160@60/50/30/25/24 Hz 1920x1080p@60/59.9/50/30/29.97/25/24/23.98 Hz 1920x1080i@30/29.97/25 Hz 1280x720p@60/59.94/50 Hz	720x576p@50 Hz 720x576i@50 Hz 640x480p@60/59.96 Hz 640x480i@30 Hz
VESA All resolutions are 60 Hz	2560×1600 2048×1536 1920×1200 1680×1050 1600×1200 1440×900 1400×1050 1280×1024	1280×800 1366×768 1360×768 1152×864 1024×768 800×600 640×480
VESA 21:9	5120×2160 @ 30 Hz 4:4:4 3840×1600 @ 60 Hz 4:4:4 3840×1600 @ 30 Hz 4:4:4 3440×1440 @ 60 Hz 4:4:4	3440×1440 @ 50 Hz 4:4:4 3440×1440 @ 30 Hz 4:4:4 2560×1080 @ 60 Hz 4:4:4 2560×1080 @ 30 Hz 4:4:4
Scaler⁽¹⁾	IN	OUT
	4K@24 Hz 4K@30 Hz 4K@60 Hz	1080p@24 Hz 1080p@30 Hz 1080p@60 Hz
USB-C	Up to 4K/UHD @ 60 Hz
Color Space	YUV, RGB
Chroma Subsampling	4:4:4, 4:2:2, 4:2:0⁽²⁾
Color Depth	8-bit, 10-bit, 12-bit
HDR	HDR10, Hybrid-Log Gamma (HLG), and Dolby® Vision™ @ 60 Hz


Audio
HDMI Pass-Through Formats	PCM 2.0 LPCM 5.1 LPCM 7.1	Dolby® Digital Dolby Digital Plus™ Dolby TrueHD	DTS® Digital Surround™ DTS-HD Master Audio™
Bit Rate	24 Mbits/s max
Analog Audio
Format	2-channel stereo
Balanced Output	+4 dBu, nominal gain; +20 dBu headroom
Frequency Response	20 Hz to 20 kHz, ±0.5 dB
Impedance	150 Ω
Stereo channel separation	> 90 dB
THD + N	< 0.004% @ 20 Hz to 20 kHz
SNR	> 94 dB @ 1 kHz, zero clipping @ 0 dBFS, unweighted


USB
Compliance	3.0
Maximum Data Rate	5 Gbps⁽³⁾
USB-C	Supports audio, video, device and host data
Internal Hubs	1 USB hub (when connected to USB-C or USB type B host port)


Ethernet
Port	1 x RJ45
Standards and Protocols	HTTP, HTTPS, Telnet, SSH, mDNS
Speeds	10/100 Mbps
Addressing	DHCP, Static – selectable through front panel, IP, RS-232 commands, and built-in web server


RS-232
Port	1 x 4-pin captive screw; TX, RX, GND
Use	Device control and configuration
Baud Rates	2400, 4800, 9600, 19200, 38400, 57600, 115200
Data flow	Bidirectional


IR
Port	1 x 4-pin captive screw; TX, GND
Use	Pass-through control
Frequency Range	30 kHz to 60 kHz


CEC
Port	1 x HDMI OUTPUT, Type A, 19-pin female
Triggering	Through IP, RS-232, and built-in web server


Resolution / Distance	4K/UHD – Feet / Meters		1080p – Feet / Meters
HDMI IN/OUT	15	5	30	10
USB-C⁽³⁾	6.6	2	6.6	2


Buttons and Indicators
Buttons: DISPLAY, INPUT IP MODE, RESET	2 – momentary, tact-type 2 – momentary, tact-type
Indicators: PWR, INPUT IP MODE, RESET	3 – LED, green 2 – LED, green


Connectors
HDMI IN	1 – Type A, 19-pin female
USB-C IN	1 – USB Type-C v3.1, 24-pin female, AV input (Alternate Mode)
HDMI OUT	1 – Type A, 19-pin female
USB HUB	2 – Type A, 4-pin female
USB HOST	1 – Type B, female
AUDIO OUT	1 – 5-pin captive screw, balanced / unbalanced 2-channel
RS-232 / IR OUT	1 – 4-pin captive screw (bidirectional)
LAN	1 – RJ45, 100Base-T
PWR	1 – 4-pin mini-DIN


Environmental	Fahrenheit	Celsius
Operating Temperature	+32 to +122	0 to +50
Storage Temperature	-4 to +140	-20 to +60
Operating Humidity (RH)	20% to 90%, non-condensing
Maximum Operating Altitude	2000 meters


Power
Consumption	Max: 14.5 W
External Power Supply	100 – 240 V AC, 50/60 Hz
	Output: 5 V / 4 A DC


Dimensions (H x W x D)	Inches	Millimeters
Unit	1.02 x 8.62 x 5.98	26 x 219 x 152
Power Supply (AT-PS-54-L)	1.22 x 1.97 x 3.17	31 x 50 x 80.6


Weight	Pounds	Kilograms
Device	2.15	0.975


Certification
Device	CE, FCC, CB
Power Supply	CE, FCC, UL, CB


Certification
NDAA-899	Yes

⁽¹⁾ Scaler does not support frame rate conversion.

⁽²⁾ When USB SuperSpeed (SS) mode is enabled, video output is supported up to 4K @ 30 Hz and the USB data rate is 5 Gbps. If disabled, video output is supported up to 4K @ 60 Hz and data rate is limited to 480 Mbps.

⁽³⁾4:2:0 is not supported over USB-C.

⁽⁴⁾When USB SuperSpeed (SS) mode is enabled, video output is supported up to 4K @ 30 Hz and the USB data rate is 5Gbps. If disabled, video output is supported up to 4K @ 60 Hz and data rate is limited to 480 Mbps.

Diagrams

Compact yet versatile AV + USB integration hub

The two-input OME-MH21 is ideal for soft codec and web-based conferencing applications, plus collaboration between small groups of people.

Resources

Product Discontinuation Notice (EOL)

AT-OME-MH21

Documentation

	Datasheet
	Installation Guide
	Guía de instalación
	Manual
	API

Declaration of Conformity

	AT-OME-MH21
	CE AT-OME-MH21
	UK AT-OME-MH21

Related Products

Product	Description
AT-CAP-FC110	Captivate™ 4K ePTZ Auto-Framing Camera
AT-CAP-SP100	Captivate™ USB / Bluetooth Speakerphone
AT-HDVS-CAM	PTZ Camera
AT-OCS-900N	Network-Enabled Occupancy Sensor
PKT-3H	Architectural Cable Access Enclosure for Three Cables
LC-H2H	LinkConnect HDMI to HDMI Cable
LC-MDP2H	LinkConnect Mini DisplayPort to HDMI Cable
AT-LC-UC2UC-2M	LinkConnect USB-C to USB-C Cable
AT-GAIN-60	Stereo / Mono Power Amplifier – 60 Watts
AT-GAIN-M50-LZ	Mixer Amplifier – 50 Watts

Similar Products

Product	Description
AT-OME-MH21-CP	Two-Input Switcher for HDMI and USB-C with USB Hub and Device Charging
AT-OME-ST31A	4K/UHD Three-Input Switcher for HDMI and USB-C with HDBaseT and HDMI Outputs
AT-OME-SW32	4K HDR 3×2 Matrix Switcher for HDMI and USB-C with HDMI Outputs
AT-OME-MS42	4×2 Matrix Switcher for HDMI, USB-C, DisplayPort, and HDBaseT with USB
AT-OME-MS52W	5×2 Matrix Switcher for HDMI, USB-C, DisplayPort, and HDBaseT with USB and Wireless Link
AT-HD-SC-500	Three-Input HD Video Scaler for HDMI and VGA Signals

AT-OME-MH21 Firmware

Firmware	Version 1.0.6
File Size	13.0 MB
Date	07.10.24

Release Notes

Version 1.0.6

Features

Added EDIDs for ultrawide screen displays.
Updated the number of supported characters in Display Control to 100 characters.

Bug Fixes

Fixed API command feedback.
Removed non-functional API commands.

Known Bugs

None.

Previous Releases

Version 1.0.5

Features

Added the ability to toggle HDMI +5V. This feature allows a display to go to sleep when there is no signal present. It’s also used for VTC codecs that need to see a change in HDMI +5V in order to change modes. If faster switching times are desired, then this should be set to Always On.
Added the ability to toggle USB VBus. This is the ability to have the USB hub ports always provide power or follow the presence of a connected USB host. For instance, if connected to the AT-CAP-SP100, setting this to Always On would allow the AT-CAP-SP100 to continually charge even when no USB host is present.
Added support for AT-OCS-900N.

Bug Fixes

USB-C compatibility with Lenovo laptops.
Poly E70 Camera is now functional with AT-OME-MH21 / AT-OME-MH21-CP.
Fixed USB connectivity with Apple laptops.
CEC with LG Displays.

Known Bugs

Velocity VDM does not currently support the new features. If you wish to configure HDMI +5V, USB VBus, or OCS-900, it is recommended to use the WebUI of the AT-OME-MH21 / AT-OME-MH21-CP.

Version 1.0.4

Features

Updated to TLS v1.2.
Users can now create passwords up to 32 characters in length when changing passwords.

Bug Fixes

Resolved an issue where the AT-OME-MH21 was operating as Follow Video instead of Follow USB.

Known Bugs

USB firmware update mechanism requires the use of a Windows computer. It is not compatible with macOS^® devices.
IR command compatibility issues are seen with some Sony^® TVs.

Version 1.0.3

Features

USB-C^® Super Speed default setting is now set to OFF.

Bug Fixes

Resolved an issue where auto-switching would not recognize an HDMI connection after a period of time.
Resolved USB-C compatibility issues with the following devices, where the display wouldn’t show when USB Super Speed mode was set to ON:

HP EliteBook
HP Chromebook x360
Fujitsu Lifebook

Version 1.0.2

Bug Fixes

Added missing display manufacturers to the IR database.
Adding a username no longer prompts a ‘please check connection’ page.

Version 1

Factory firmware

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Notify Me!

Control Drivers

Atlona Velocity	Atlona’s IP-based AV control and management
Date	02.22.21

3rd Party Control Systems

Crestron	Crestron AT-OME-MH21 RS-232 and TCP/IP Control
File Size	1.6 MB
Date	02.22.21

Overview

Simple collaboration and video conferencing hub

A compact switcher for small spaces and more.

A unique, two-input switcher design that can go anywhere, discreetly. The OME-MH21 is right-sized for small-group collaboration in huddle rooms or many other spaces.