Cisco TelePresence System 3000 Series

CTS System Status for External Projector/LCD Shows Red X

Document ID: 116728

Updated: Nov 11, 2013

Contributed by Paula Talamo, Paul Anholt, and Paul Stojanovski, Cisco TAC Engineers.



In the Cisco TelePresence System (CTS), an external projector or LCD may be working correctly, yet have a red X in the System Status GUI. This document describes several methods to troubleshoot the red X. Additional troubleshooting tips are available in the product guides in Related Information.



Cisco recommends that you have knowledge of these topics:

  • Cisco TelePresence endpoints
  • Cisco Unified Communications Manager (CUCM)

Components Used

The information in this document is based on these software and hardware versions:

  • Cisco TelePresence TX9000 Series
  • Cisco TelePresence TX9200 Series
  • Cisco TelePresence TX1310 Series
  • Cisco TelePresence System 3000 Series
  • Cisco TelePresence System 3010 Series
  • Cisco TelePresence System 3200 Series
  • Cisco TelePresence System 3210 Series
  • Cisco TelePresence System 1300 Series

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Problem: Red X Appears in System Status Although External Projector/LCD Works


Even if an external projector or LCD is working correctly, a red X may appear in the CTS System Status. In order to earn a green check, cables must be plugged in correctly, CUCM settings must be configured, and compatible versions must be used.

First, verify the setup:

  • Is the projector or LCD on?
  • Are the projector or LCD cables connected?

Then, use the solutions presented in this document in order to verify the codec profile, check the hardware, and review the software for potential issues.

Solution 1: Configuration

This procedure describes how to verify the codec profile on the CUCM:

  1. If you have a CTS 3010/3210 system, verify that the correct Cisco TelePresence Type is selected in Product Specific Configuration Layout. Ensure that the correct external device is selected in the CUCM; CTS 3000/3200 systems have an external projector, and CTS 3010/3210 systems have an external LCD.


  2. Ensure that the Presentation Output Device is Projector/Display.


  3. If an auxiliary control unit (ACU) is being used, verify the Auxiliary Control Unit check box is selected. If there is a presentation codec within the environment, verify the Presentation Codec check box is selected.


Solution 2: Hardware

If the configuration is correct, you should then check the hardware.

First, ensure a supported projector or LCD is being used. See Release Notes for Cisco TelePresence System Software Release 1.10: Supported CTS Auxiliary Devices for further information.

Next, verify the cabling. Cables must be plugged into specific ports in order to pull and push information correctly; correct cabling varies with different CTS hardware.

Systems with ACU

The serial cable must be connected to the serial 1 output port on the ACU.

Systems with LCU

The light control unit (LCU) is the successor to the ACU and is used only with TX Series endpoints. The cabling is much simpler.

For TX9000/TX1310 systems, the serial cable must be connected to the only serial 1 output on the ACU.

There is currently only one model LCD with the TX Series endpoints, and it has one serial port connection on the back. If you are facing the front of the LCD, the port is in the back of the display on the left side. Verify the cable is seated tightly in the port.


Systems with Projector and ACU

Ensure the serial connection into the service port of the projector is properly connected. The cable has a spring-loaded sleeve that must be pulled back in order to lock the connector into place. When the cable is connected properly, you should hear a click when the connector locks in place, and you should not be able to pull the cable loose from the projector.


Systems with ACU, Serial Cable, and External LCD

The serial cable must be connected to the INPUT serial port 1 on the LCD. This port is located closest to the meeting participants and is right next to the High-Definition Multimedia Interface (HDMI) connection.

Note: If you use the second serial port on the LCD, an alarm results, and default settings are not pushed.

This is a front view of the external LCD on a CTS 3x00 system.


The underside view of the same LCD shows the serial cable correctly connected to serial port 1. The HDMI cable is the black cable connected next to it.


Systems with AEB

The Audio Expansion Board (AEB) is also know as an Audio Expansion Unit or A/V Expansion Box. The LCD cable (auxiliary display) should be connected to the video out (HDMI) port 4 on the AEB.


Note: Because there are different models and different peripheral options, consult the appropriate assembly guide for additional diagrams and setup details.

Systems with LAEB

On TX9x00/TX1310 systems with a Lago Audio Expansion Board (LAEB), the cabling was slightly modified because a redesign added a second display port. The second port on the TX1310 system is used for the microphone array.


Solution 3: Software


Use the Command Lookup Tool (registered customers only) in order to obtain more information on the commands used in this section.

The Output Interpreter Tool (registered customers only) supports certain show commands. Use the Output Interpreter Tool in order to view an analysis of show command output.

If the configuration and hardware are set up correctly, look for potential software issues on systems with an ACU. This procedure describes how to verify that the software version on the ACU is correct and current:

  1. Go to the Secure Shell (SSH) in order to access the codec, enter the show upgrade detail command, and look for the version of the 'auxiliary ctrl.' In this example, the ACU is running version 1.27 but should be running version 1.30.


  2. To push an upgrade to the ACU, enter the set upgrade auxiliary-ctrl command, then restart the codec with the utils system restart command.


  3. Once the codec is back up, verify that the version is now correct.

On the TX series platform with the LCU, use this same approach to check the firmware. Instead of version 1.30, ensure the 'auxiliary ctrl' is running version 1.10.

If your CTS system is running version 1.6.0 through 1.6.3, you might encounter a known defect. See Cisco Bug ID CSCtf40685, "CFD: Setting presentation LCD defaults fails with 1.6," for more information.

Additional Help

This document should help you resolve most cases where a red X is seen in the System Status. However, if an alarm is still present after you explore the solutions in this document, contact Cisco Customer Support for further assistance.

Related Information

Updated: Nov 11, 2013
Document ID: 116728