Polycom RealPresence 1800 Administration Manual page 232

General System Flags
Flag Name
SEND_SRTP_MKI
Polycom, Inc.
Description
Enables or disables the inclusion of the MKI field in
SRTP packets sent by RealPresence Collaboration
Server. Setting the value to NO to disable the
inclusion of the MKI field in SRTP packets sent by
the RealPresence Collaboration Server.
Set this flag to:
• NO
 When all conferences on the RealPresence
Collaboration Server will not have Microsoft
Lync clients participating and will have 3rd
party endpoints participating.
 When using endpoints (for example,
CounterPath Bria 3.2 Softphone) that cannot
decrypt SRTP-based audio and video
streams if the MKI (Master Key Identifier) field
is included in SRTP packets sent by the
RealPresence Collaboration Server.
We recommend this setting for Maximum
Security Environments.
• YES
 When any conferences on the RealPresence
Collaboration Server will have both Microsoft
Lync clients and Polycom endpoints
participating.
 Some third-party endpoints might be
unsuccessful in participating in conferences
with this setting.
Notes:
• This system flag must be added and set to YES
(default) when Microsoft Office Communicator
and Lync clients are used as they all support
SRTP with MKI.
• The system flag must be added and set to NO
when Siemens phones (Openstage and ODC
WE) are used in the environment as they do not
support SRTP with MKI.
• Polycom endpoints function normally regardless
of the setting of this flag.
Default value: YES
Possible value: YES/NO
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System Flags
Platform Add?
HW/VE Yes
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