1-Local / Remote Shared Access Single Port 4K HDMI KVM over IP Switch


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1-Local / Remote Shared Access Single Port 4K HDMI KVM over IP Switch

ATEN CN9850 Diagram

The CN9850 KVM over IP Switch enables remote access to the video, audio, and virtual media of a PC or workstation, featuring HDMI high-definition video with resolutions up to 4K DCI (4096 x 2160) at 30 Hz for both local and remote consoles. Utilizing an advanced FPGA graphics processor, the CN9850 delivers superior image and video quality to enhance the user experience and adheres to RS-232 standards for serial control.

For convenient operation, the front panel includes a mini USB port designed as a Laptop USB Console (LUC) port, allowing users to connect a laptop for easy maintenance without needing an additional monitor, keyboard, and mouse.

To ensure reliable connectivity, the CN9850 includes dual LAN and dual power features, maintaining smooth and efficient operations in the server room. Its power status detection function automatically sends notifications during power failures or when devices go offline, facilitating device status monitoring. Additionally, the CN9850 has a 5-pin Relay / DI (digital input) terminal block for remote server reboot and receiving input from connected alarm devices for critical event notifications.

For remote management, the CN9850 WebClient Viewer offers remote desktop access without requiring extra software applications. The HDMI 4K KVM over IP Switch provides a web-based GUI for remote access and management, with a unified multi-language interface to reduce user training time and boost productivity.

The CN9850 is perfect for data centers, server rooms, and control rooms needing remote access management. It caters to industries requiring high-quality images and multitasking capabilities, such as global organizations and companies with multiple office locations, serving as a bridge between local and remote workplaces.

CN9850 Features


  • Supports HDMI resolution up to 4K DCI (4096 x 2160) @ 30 Hz*
  • A mini USB port in the front panel can serve as a Virtual Media USB port or a Laptop USB Console (LUC) port
  • Compact and slim design for space utility optimization
  • Supports 5-pin Relay / DI Terminal for environment monitoring and remotely reboot control
  • Provides an FPGA graphics processor for better image quality
  • Two 10 / 100 / 1000 Mbps NICs for redundant LAN or two IP operation
  • Dual power supply to ensure seamless connectivity
  • Provides over IP capability to HDMI KVM switches without over IP functionality
  • Allows access to the CN9850 via a built-in serial viewer, or via third-party software (such as PuTTY) for Telnet and SSH sessions
  • Note: Audio is not supported by CN9850 HDMI and can only be transmitted through its 3.5 mm audio ports.


  • Complies to the RS-232 standards for serial control
  • Up to 64 user accounts - up to 32 users can simultaneously share control
  • Console access right management
  • End session feature - administrators can terminate running sessions
  • Event logging and Windows-based Log Server support
  • Event logging - the CN9850 can record all events that take place on it and write them to a searchable database
  • Supports instant notification of critical system events via email, SNMP trap, and Syslog
  • Firmware upgradable via remote access
  • Out of Band support - access the CN9850 through its serial port using a dial-up connection
  • Local / Remote Share Mode conveniently grants shared or exclusive console privilege
  • Port Share Mode allows multiple users to gain access to a server simultaneously
  • DDNS - allows mapping of a dynamic IP address assigned by a DHCP server to a host name
  • Supports export / import of user account and configuration settings
  • Supports permission-controlled browser operation
  • Supports IPv6
  • Integration with ATEN CC2000 Management Software
  • Integration with ATEN CCVSR Video Session Recording Software

Easy-to-Use Interface

  • Browser-based and AP GUIs offer a unified multi-language interface to minimize user training time and increase productivity
  • Multiplatform client support (Windows, Mac, Linux, Sun)
  • Multibrowser support (IE, Firefox, Safari, Opera, Chrome)
  • Browser-based UI in pure web technology allows administrators to perform administrative tasks without pre-installed Java software package requirements
  • Full-screen or sizable and scalable Virtual Remote Desktop
  • Magic Panel with configurable function for quick launch

Advanced Security

  • Smart Card / CAC Reader support
  • External authentication support: RADIUS, LDAP, LDAPS, and MS Active Directory
  • Supports TLS 1.2 data encryption and RSA 2048-bit certificates to secure users logging in from browsers
  • Flexible encryption design allows users to choose any combination of 56-bit DES, 168-bit 3DES, 256-bit AES, 128-bit RC4, or Random for independent keyboard / mouse, video, and virtual media data encryption
  • Supports IP / MAC Filter
  • Supports password protection
  • Private CA

Virtual Media

  • Virtual media enables file applications, OS patching, software installation, and diagnostic testing
  • Works with USB-enabled servers at OS and BIOS level
  • Supports USB 2.0 DVD / CD drives, USB mass storage devices, PC hard drives, folders, and ISO images

Virtual Remote Desktop

  • Video quality and video tolerance can be adjusted to optimize data transfer speed; monochrome color depth, threshold, and noise settings can be adjusted for compression of the data bandwidth in low-bandwidth situations
  • Full-screen video display or scalable video display
  • Message Board for communication among remote users
  • On-screen keyboard with multi-language support
  • Mouse DynaSync™ - automatically synchronizes the local and remote mouse movements
  • Supports Exit Macros
  • BIOS-level access

ATEN CN9850 Ports

Data Sheet

User Manual

ATEN CN9850 Technical Specifications

Console Ports 2 x USB Type A Female (White)
1 x HDMI Female (Black)
1 x Mini Stereo Jack Female (Green)
1 x Mini Stereo Jack Female (Pink)
KVM Ports 1 x USB Type B Female (White)
1 x HDMI Female (Black)
1 x Mini Stereo Jack Female (Green)
1 x Mini Stereo Jack Female (Pink)
LAN Ports 2 x RJ-45 Female
Power 2 x DC Jack
Serial 2 x RJ-45 Female
Control 1x PS/2 Female
Laptop USB Console (LUC) Port 1 x USB Mini-B Female
Reset 1 x Semi-recessed pushbutton (Black)
Keyboard / Mouse USB
Power 2 (Green)
Video Local console - 4096 x 2160 @ 30 Hz
Remote console - 4096 x 2160
Power Consumption DC5V:10.07W:48BTU/h
● The measurement in Watts indicates the typical power consumption of the device with no external loading.
● The measurement in BTU/h indicates the power consumption of the device when it is fully loaded.
Operating Temperature 0 - 50°C (CN9850)
0 - 40°C (Power Adapter)
Storage Temperature -20 - 60°C
Humidity 0 - 80% RH, Non-condensing
Physical Properties
Housing Metal
Weight 0.84 kg ( 1.85 lb )
Dimensions (L x W x H) 20.00 x 15.05 x 2.84 cm
(7.87 x 5.93 x 1.12 in.)
Note For some of rack mount products, please note that the standard physical dimensions of WxDxH are expressed using a LxWxH format.