Change Multipoint Viewing Layout; Encryption And Security; Verify Encryption Check Code - Polycom RealPresence Group 300 User Manual

Change Multipoint Viewing Layout

You can change the multipoint viewing layout by browsing through the available options in the local inter-
face.
To change your layout during a multipoint call:
1 With your remote control, select
2 Select Near Video or Far Video.
3 Cycle through the available layouts for the call to decide which layout you prefer.
The available layouts vary depending upon certain factors, such as how many participants are in the
call or the content status.

Encryption and Security

If encryption is enabled on the system, a locked padlock
encrypted.
If a call is not encrypted, an open padlock appears on the monitor screen.
● If you are in a point-to-point call or a multipoint call hosted by another system, the padlock icon
displays the state of your individual connection.
● If you are hosting a multipoint 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: Communicate state of padlock icons
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 RealPresence Group system provides an encryption
check code. Participants in a call can use this check code to verify that their call is not being intercepted by
a third party. This mechanism is most useful for point-to-point calling.
The check code is a 16-digit hexadecimal number that is calculated so that the number 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.
Polycom recommends verifying check codes at each site to protect against third-party eavesdropping on
H.323 point-to-point calls.
Polycom, Inc.
> Layout.
appears on the monitor screen when a call is
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