Due to a common installation problem, TX1310 endpoints may exhibit symptoms including camera segments not switching correctly, table microphones that cut in and out, and the Lago Audio Expansion Box (LAEB) displays an error. This document describes how to identify the specific microphone array error and the steps to apply in order to resolve the issue. Additional troubleshooting tips are available in the product guide under Related Information.
Cisco recommends that you have knowledge of these topics:
- Cisco TelePresence TX1310 Series
- Cisco Unified Communications Manager (CUCM)
The information in this document is based on these software and hardware versions:
- Cisco TelePresence TX1310 Series
The information in this document was created from the devices in a specific lab environment. All of the devices used on 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: Positional Microphone Errors
The main symptoms of this issue include:
Solution: New Cable Installation Procedure
This procedure describes the rework of the cable layout behind the 65 inch display. The specific cable in question is a DisplayPort cable that connects the Positional Array Microphone (PAM) to the LAEB. If this cable does not have enough slack, the display will have to be removed to cut cable ties on the frame. There is also a DisplayPort cable within the PAM itself to be checked.
Identify the microphone array assembly along with the DisplayPort cable connecting the LAEB and PAM that runs behind the display.
Verify Switching Microphone Cabling
- Power off the system, then disconnect the main power to the endpoint.
- Remove the speaker cover from the frame by carefully lifting vertically.
- Reseat the DisplayPort cable that runs behind the display at the PAM end and the LAEB end.
- Measure the amount of free cable from the top zip tie for this cable. If there is not at least 22 inches of slack, the revised installation procedure needs to be followed.
- Reseat the DisplayPort cable that runs between the two PCBs on the PAM itself. These PCBs are behind the speaker cover under foam. You need to peel back the foam to access the cables on each end.
- Route the DisplayPort cable that connects from the LAEB to the PAM through the cable loop attached to the speaker cover. If there is no cable loop present, install one using a tie-wrap in this position. This will relieve pressure on the cable terminal on the PAM.
- Install the speaker cover back onto the frame. Ensure that you do not pinch the end of the DisplayPort cable on the light bar and that the blue LED remains lit at all times.
Revised Installation Procedure: Cutting Cable Ties
If the DisplayPort cable slack is less than 22 inches, follow this procedure to cut the zip ties behind the display and relieve cable tension. This procedure refers to revised figures and steps from the TX1310 installation guide in reverse order.
- Disconnect all cables from the main display. Ensure the cables slide out without issues and no tension is present when the display is removed.
- Remove the display from its mount. Refer to Figure 2-41 from the installation guide.
- Remove the speaker cover from the cabinet by lifting vertically. Disconnect the DisplayPort cable attached to it.
- Remove the attached Display Mounting Plate from the Metal Sliders as shown in Figure 2-36.
- Cut the zip ties in Figure 2-35; ensure you do not cut any of the bundled cables.
- Hang the Display Mounting Plate, removed in step 4, to the Metal Sliders.
- Reinstall the 65-inch plasma display.
- Connect the Power and Digital Visual Interface (DVI) cables to the display.
- Connect the DisplayPort cable back to the microphony array, ensuring that it passes thorough the cable loop.
- Connect main power from the endpoint and power on the endpoint.