Cabling; Monitor; Presentation Issues. Sending Of Images From Attached Computer; General - Cisco TelePresence C20 Troubleshooting Manual

Monitor

Checklist:
• physical cabling – What output from the video system is being used and what input on the
screen does it connect to. Swap the cable.
• Check that the input selected on the screen matches the connector the cable from the video
system is plugged into (C Series, SX20 only).
• if you are using a digital connection (HDMi, DVi), the resolution of the screen should be detected
and the correct resolution set on the video system. Check that the output resolution from the
video system is a resolution supported by the screen by choosing
Status -> Video -> Ouput.
• Confirm that another device connected to same input on the screen is displayed correctly.

Cabling

The easiest method of troubleshooting cable issues is to swap out the suspected cable with another
standard cable. This one should be within the specifications for the type of cable used. if you are running
cables at the limits of length specifications, try a cable that is well within the specifications and has no
extenders, splitters or converters attached. Then restart all equipment.
For video issues check the video input to ensure that the codec is getting a signal from that connector
(see previous section). if there is no signal on the input where the equipment is connected and the
equipment (camera, pC, Doc Cam) has been confirmed working separately, then the cabling could
be the problem.

Presentation issues. Sending of images from attached computer

General

When you select to send a presentation, the information from the selected input will be transmitted to the
far end as a separate data stream from the main video source (camera). if you are having presentation
problems, first check that the presentation is seen locally. if it is not, check the input source selection
below to ensure the video system is set to the correct input source.
if you are sending a presentation but are having quality issues, please see the section below on settings
that may affect presentation quality.

Input Source Selection

if you have connected a computer to the video system and are having problems with sending a presen-
tation to the far-end, check to see if the presentation is visible on the video system locally. if you cannot
see the presentation locally then check the following:
• Check that the cabling connected correctly and that the cables are working properly.
• Ensure that the computer is set to display its output on the external output connected to the
video system.
D15029.01 Troubleshooting Guide TC6.0, April 2013.
•
Configuration -> System
When starting a presentation using the Touch panel, you can see which input source is selected for
the presentation and you can change the source by swiping left or right to see the alternate sources.
Generally you should see something similar to the image below, where the pC is selected for presentation.
Presentation quality
You can check the resolution and codec used for the presentation from the System Information/
Call Status screen on the Touch panel or remote control or look at the
Participants screen
current call to show more detailed information. You should see that there is information under the
Presentation section under Transmit.
Here you can see that a presentation is being sent using H.264 video codec at a resolution of 1024 x 576
at 15 fps.
11
Check that the default presentation source is set correctly on the video system to the correct
input. Configuration -> System Configuration -> Video -> General Settings
are EX60=1, EX90=2, C Series=3, SX20=2). To determine what the numbers for the various
inputs mean, scroll down the Configuration -> System Configuration -> Video -> Input
you can see what input corresponds to each number.
in the web interface and press the small arrow to expand the information on the
Troubleshooting Guide TC6.0
(Default values
Call Control -> Call Control ->
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