Note: If you enable automatic muting during a call, the audio for the current meeting is not affected.
Procedure
1. Navigate to Settings > User Settings > Meetings.
2. Select Mute Auto Answer Calls.
After a call connects, press on the remote control when you're ready to unmute the
microphones.
When a call is muted, this icon displays on your monitor.
Encryption and Security
When a call is encrypted, a locked padlock displays on the monitor. If a call is not encrypted, an open
padlock displays on the screen. The padlock icon also displays in the following situations:
▪ If you are in a point-to-point call or a conference call hosted by another system, the padlock icon
displays the state of your individual connection.
▪ If you are hosting a conference call, the padlock icon displays the combined state of all
connections: encrypted if all connections in the call are encrypted, unencrypted if one or more
connections in the call are not encrypted.
In one call, some connections might be encrypted while others are not. However, the padlock icon might
not accurately indicate whether the call is encrypted if the call is cascaded or includes an audio-only
endpoint. If encryption is required on your system, the far-end must support encryption or the call will not
be completed.
Note: To avoid security risks, Polycom recommends that all participants communicate the state of their
padlock icons verbally at the beginning of a call.
Verify Encryption Check Code
To provide extra security for encrypted H.323 calls, the system provides an encryption check code.
Participants in a call can use this check code to verify that the call is not being intercepted by a third party.
Polycom recommends verifying check codes at each site to protect against third-party eavesdropping on
H.323 point-to-point calls. The check code is calculated so that the check code is the same at both sites
in the call. The numbers are identical if, and only if, the calculation uses data exclusively from the two
sites in the call, with no data being intercepted and modified by a third party. Note that in externally-
hosted multipoint calls, check code numbers do not match any other numbers in the call.
Procedure
1. Place an encrypted H.323 point-to-point call.
2. Press on your remote control, then navigate to Settings > System Information > Call
Statistics.
3. On the Call screen, select Call Statistics.
4. For Call Encryption, locate the check code, as shown in the following example: AES-128/TLS/
SDED.
5. Verbally verify that the check code is the same at both sites.
6. Do one of the following:
Settings
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