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by Cisco
Product Line: Cisco MCU 5300 Series
Product Type: Multipoint Control Unit
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Product Description

The CTI-5320-MCU-K9 supports up to 20 (720p30 Full HD Ports), 10 (1080p30 or 720p60 Full HD Ports), and additional voice participants, with bandwidth per site reaching up to 4 Mbps. It offers compatibility with video standards including H.261, H.263, H.263+, H.263++, and H.264, and audio standards such as G.711, G.722, G.722.1, G.728, G.729, MPEG-4 AAC-LC, MPEG-4 AAC-LD, and Polycom Siren14/G.722.1. The device features an RJ-45 Ethernet interface supporting 10-/100-/1000-Mbps speeds, full and half duplex, and includes security features like AES encryption with a 128-bit key.

FAQs for the CTI-5320-MCU-K9

  • What is the maximum number of continuous presence video participants supported?
    20 participants at 720p30 Full HD, 10 at 1080p30 or 720p60 Full HD, 40 at 448p30 SD, and 48 at 360p30 nHD.
  • How many additional voice participants can be supported alongside video participants?
    The system supports an additional 20 voice participants for 720p30 HD ports and 10 for 1080p30 or 720p60 Full HD ports.
  • Can the system support custom video layouts, and if so, how many?
    Yes, the system supports more than 50 custom layouts.
  • Is it possible to stack multiple units of this system?
    Yes, up to 2 units can be stacked for expanded capabilities.
  • What is the maximum bandwidth per site that the system supports?
    Up to 4 Mbps.
  • What aspect ratios does the system support?
    The system supports both 16:9 and 4:3 aspect ratios.
  • Does the system feature an automatic lecture mode?
    Yes, it includes an automatic lecture mode for streamlined presentations.
  • What video and audio standards are supported by the system?
    The system supports H.261, H.263, H.263+, H.263++, H.264 video standards and G.711, G.722, G.722.1, G.728, G.729, MPEG-4 AAC-LC, MPEG-4 AAC-LD, Polycom Siren14/G.722.1 audio standards.
  • What are the security features of this system?
    It features a strong password policy, AES encryption with a 128-bit key, static ARP, and SIP encryption for enhanced security.
  • What are the physical specifications of the system?
    The system measures 1.75 x 17.4 x 16.7 inches (H x W x D), weighs 17.6 lbs, and is designed for a 19-inch rack. It includes a mounting kit.

Product Review

The Cisco CTI-5320-MCU-K9 offers a versatile range of video conferencing capabilities with support for up to 20 full HD (720p30) continuous presence video participants and additional flexibility in lower resolutions, accommodating larger meetings with up to 48 participants at reduced quality settings. However, its power consumption at 345W and maximum heat dissipation of 1177 BTU/hour may raise concerns for energy efficiency and cooling requirements in dense deployment scenarios. Security features, including AES encryption and a strong password policy, alongside comprehensive support for a variety of video and audio standards, make it a solid choice for organizations prioritizing secure and flexible communication options.


The Cisco CTI-5320-MCU-K9 is a conferencing bridge designed to facilitate video and audio conferencing across a variety of formats and standards. This device allows for the inclusion of up to 20 continuous presence video participants at 720p30 full HD, with the numbers adjusting based on the resolution and frame rate to a maximum of 48 participants at w360p30 nHD. Additionally, it supports 20 additional voice participants for 720p30 HD ports and 10 for 1080p30 or 720p60 full HD ports. Customization is a key feature, offering more than 50 layout options for video presentations, ensuring that users can tailor their conferencing environment to their specific needs. For larger setups, the device can be stacked with another unit, doubling its capacity and providing a seamless integration for extensive conferencing requirements. The bandwidth capacity per site is up to 4 Mbps, supporting both 16:9 and 4:3 aspect ratios, which accommodates a wide range of video feeds. It automatically switches to lecture mode, facilitating presentations and speeches in a conference setting. The system's language is English, making it accessible for a wide user base. This product supports multiple video and audio standards, including H.261, H.263, H.263+, H.263++, and H.264 for video, and G.711, G.722, G.722.1, G.728, G.729, MPEG-4 AAC-LC, MPEG-4 AAC-LD, and Polycom Siren14/G.722.1 for audio. This broad compatibility ensures that the device can interface with a wide variety of equipment and software, enhancing its versatility. With a frame rate capability of up to 60 fps, the CTI-5320-MCU-K9 delivers smooth video playback, ensuring high-quality visual communication. Connectivity options include RJ-45 Ethernet supporting 10-/100-/1000-Mbps speeds, both full and half duplex, with manual or autosensing capabilities. An RJ-45 serial port is also available for system management and diagnostics. Security is a priority, with features such as a strong password policy, AES encryption with a 128-bit key, static ARP, and SIP encryption safeguarding communications. The hardware includes status LCDs for real-time monitoring and troubleshooting, and it comes with a mounting kit for easy installation in a standard 19-inch rack. The device’s dimensions are 1.75 x 17.4 x 16.7 inches, with a weight of 17.6 lbs, making it both compact and lightweight. Power requirements are 100 to 240 VAC, with a frequency range of 50 to 60 Hz. It consumes 345 W of power, with a maximum heat dissipation of 1177 BTU/hour. The operating temperature range is from 0 °C to 35 °C, with a relative humidity tolerance below 95% noncondensing, ensuring reliable performance in a variety of environmental conditions. Key specifications include: -
  • Automatic Lecture Mode
  • Stacking Ability for 2 Units
  • Interfaces: RJ-45 Ethernet, RJ-45 Serial Port
The Cisco CTI-5320-MCU-K9 represents a flexible and efficient solution for comprehensive video and audio conferencing requirements, suitable for businesses seeking to enhance their communication infrastructure.


Product Code and Manufacturer Cisco CTI-5320-MCU-K9
Simultaneous Video Participants for Continuous Presence 20 at 720p30 Full HD, 10 at 1080p30 or 720p60 Full HD, 40 at 448p30 SD, 48 at 360p30 nHD
Additional Voice-Only Participants 20 at 720p30 HD, 10 at 1080p30 or 720p60 Full HD
Customizable Screen Layouts Over 50 Variations
Unit Linking Capability Up to 2 Units
Maximum Bandwidth per Connection 4 Mbps
Supported Video Aspect Ratios 16:9 widescreen, 4:3 standard
Automated Speaker Tracking Enabled
Operating Language English
Compliant Video Protocols H.261, H.263, H.263+, H.263++, H.264
Supported Audio Codecs G.711, G.722, G.722.1, G.728, G.729, MPEG-4 AAC-LC, MPEG-4 AAC-LD, Siren14/G.722.1
Max Frame Rate 60 frames per second
Connection Interfaces Ethernet RJ-45, 10/100/1000 Mbps, Full/Half Duplex, Auto/Manual Sensing, Serial RJ-45 Port
Encryption and Security Password Enforcement, 128-bit AES, Static ARP, SIP Encryption
Diagnostic Displays Integrated
Device Management Local Control via RS-232 Port
Dimensions 1.75 x 17.4 x 16.7 inches
Standard Rack Fit 19 inches
Mounting Equipment Provided
Weight 17.6 pounds
Power Input Requirement 100 to 240 VAC
Operational Frequency 50 to 60 Hz
Energy Consumption 345 Watts
Heat Output 1177 BTU per Hour
Temperature Range for Operation 0 to 35 °C
Humidity Tolerance Up to 95% Non-condensing

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