User guide
What’s in this guide? Getting started Making calls Using the phone book In-call features
Advanced settings
Making calls
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D1458203 USER GUIDE Profile Series, Codec C Series, Quick Set C20 / C20 Plus (TC3)—March 2010
Calling more than one (optional)
Provided that your video endpoint is equipped with the optional built-in 
MultiSite feature, any point-to–point video call (a call involving two parties 
only) may be expanded into including additional participants. The call will 
then become a video conference. 
Any ongoing video call can then be expanded into a video conference by 
adding more participants at all times (see the upper right example).
Alternatively, you may set up a list of whom to call before you actually call 
them and then call them all in one go (see the below example).
Note that your video network may have an infrastructure permitting video 
conferencing—even if your video system itself does not. This will require 
the presence of an external Multipoint Control Unit (MCU).
The most advanced video systems (those using Codec C60 or C90) 
can—when equipped with MultiSite— set up video meetings with 
four participants (yourself included). External MCUs may let you set up 
conferences with many more participants. 
Systems equipped with Codec C20 have no MultiSite feature (see 
 page 
28 to find out which type of codec your system has). However, they come 
with MultiWay
™
 installed (see the next page for more on this).
Contact your system administrator for details on how to use external MCUs.
Setting up a list of whom to call before calling them
Calling participants one by one
Terminating a video conference
This example shows two entries made 
before any calls are placed. For units 
equipped with MultiSite capabilities, 
up to three participants can be called 
simultaneously, if no external MCUs are 
used.
After you have entered the participants, 
press the 
 key to place the calls. Any 
of these may, of course, be fetched from 
the phone book in the usual manner. 
During a call, open the Call menu 
again…
Then call someone in the usual 
manner—by dialing the “number” 
(in this case “542”) or by means 
of the phone book…
Finally, navigate down to 
 Call 
and place the call… 
If you want to add another 
participant (you can call a 
maximum of three participants), 
repeat the process.
The 
participant 
you already 
are in call 
with.
The next 
participant 
you are 
going to 
call.
Use 
this to 
place the 
call.
The host of a video conference is the 
endpoint to which all the others are 
connected—the one who initiated 
the conference.
The host has the right to terminate 
the connection to any of the 
participants. The participants cannot 
control any of the others, but may 
disconnect themselves from the 
meeting at all times. 










