Isdn Link; Microphones - Cisco TelePresence C20 Troubleshooting Manual

ISDN Link

iSDN link is used in conjunction with a single endpoint to allow inbound and outbound iSDN calls. With
TC6.0 and il1.1 you can use the video systems web interface to pair the iSDN link with a codec. You
can also use the web interface to manage and upgrade the iSDN link.
When you access the web interface of a TC6 system, you can easily see if it is paired and configured
with an iSDN link. On the System information screen, you can find a H320 section under the Sip/H323
sections. in addition, Diagnostics will indicate if an iSDN link is detected.
if there are any configuration issues on the iSDN link, you will see a red lED on the iSDN link and
a warning on the System information screen on the web interface of the paired TC6 system. in the
example below there is an error on the pri interface. red alarm and l2 indicate a low level iSDN issue.
in this case the cable was physically unplugged from the iSDN link.
To manage the system, change the configuration, check the status or upgrade the iSDN link you can
do this from Configuration -> Peripherals and click
Common Issues
if you see the error message "Not Sip-registered to H320 peripheral" ensure that Sip is enabled. On the
web interface select Configuration -> System Configuration -> Network Services -> SIP Mode ->
Check that Sip outbound is not enabled either on the iSDN link or the video system you are pairing
the iSDN link to.
D15029.01 Troubleshooting Guide TC6.0, April 2013.
Manage ISDN Link.

Microphones

By default all microphone inputs are enabled and mixed on the C Series, MX Series and SX20. The EX
Series has more selection of inputs and you can choose to use the handset, headset, Bluetooth or the
built-in microphone on the system.
if the far-end cannot hear you, you should check the following:
• Microphone is not muted. MX, C20, SX20 can be muted and unmuted from a button on the
microphone or Touch panel. You can see the microphone status on the
section of the web interface.
• Microphone is physically connected to the system (C Series, SX, MX).
• Correct input is selected: phone, headset, built-in, Bluetooth (EX Series).
• Try another microphone and cable (C Series, SX, MX), or headset/handset/Bluetooth device
(EX series).
• if you are using the remote control, you can check the audio input levels and see if the microphones
are picking up sound. To do this go to
Under the VU you will see a meter showing activity on the microphones.
• if you have a C40, C60 or C90 you can download the TC Console application. Under the audio
section enable the VU meter to check the microphone inputs live.
ON.
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Troubleshooting Guide TC6.0
Call Control -> Call Control
Settings -> Administrator Settings -> Audio input
Copyright © 2013 Cisco Systems, Inc. All rights reserved.
levels.