User manual
Chapter 5-Address Book
5-10
Video Protocol Select the video compression standard that will be 
forced by the MCU on the endpoint when connecting 
to the conference: H.261, H.263 or H.264.
Select Auto to let the MCU select the video protocol 
according to the endpoint’s capabilities.
Broadcasting 
Volume + 
Listening Volume
To adjust the volume the participant broadcasts to the 
conference or the volume the participant hears the 
conference, move the slider; each unit represents an 
increase or decrease of 3 dB (decibel). The volume 
scale is from 1 to 10, where 1 is the weakest and 10 
is the strongest. The default connection value is 5.
Encryption
(IP Only)
Select whether the endpoint uses encryption for its 
connection to the conference.
Auto (default setting) indicates that the endpoint will 
connect according to the conference encryption 
setting.
Encryption is not supported in ISDN/PSTN calls. 
ISDN/PSTN participants can connect to encrypted 
conferences only if the system flag is set to allow 
non-encrypted participants to connect to encrypted 
conferences.
AGC AGC (Auto Gain Control) mechanism regulates noise 
and audio volume by keeping the received audio 
signals of all participants balanced. Select this check 
box to enable the AGC mechanism for participants 
with weaker audio signals.
Note: Enabling AGC may result in amplification of 
background noise.
Table 5-3 New Participant – Advanced Properties (Continued)
Field Description










