Appendix I-Polycom Open Collaboration Network (POCN)
Polycom, Inc.
I-41
Selecting
TIP Compatibility
as
Video and Content
disables
Content Settings
in the
Video Quality
tab.
In
Prefer TIP
mode, it is pre-requisite that the
CTS
and
CUCM
versions support
H.264
base profile content without restrictions and that the
CTS
version be 1.9.1 or
higher and that
CUCM
version be version 9.0 or higher.
Encryption
Encryption between the RealPresence Collaboration Server (RMX) 1500/2000/4000 and a
CISCO environment is supported. Media is encrypted using SRTP, while control is
encrypted using SRTCP. TIP is encrypted using SRTCP. SIP is be encrypted using TLS.
When upgrading, the RMX automatically creates a self-signed certificate to support
encrypted communications with CISCO endpoints.
For media encryption. the RMX will first attempt to exchange keys using DTLS. If the RMX
fails to exchange keys using DTLS, SIP TLS encrypted with SDES is used to exchange media
encryption keys.
Guidelines
•
This feature is not supported in
Ultra Secure Mode
.
•
Voice activity metrics and RTP are not encrypted.
•
In the event that DTLS negotiation fails, SIP will be encrypted using TLS if enabled in
the IP Management Network properties, SIP Servers tab. DTLS negotiation does not
require SIP TLS.
—
In a mixed CISCO and Microsoft Lync environment, in order to assure encrypted
communications with both CISCO endpoints and Microsoft Lync in the event of
DTLS negotiation failure, the certificate defined in the IP Management Network
Services properties dialog box, SIP Servers tab, must have been issued by the same
certificate authority that issued the certificates used by both the Microsoft Lync
server and the CUCM server.
•
The flag,
SIP_ENCRYPTION_KEY_EXCHANGE_MODE
, is used to control this
feature. The possible values are:
—
AUTO (default): Normal encryption flow
—
DTLS: Only use DTLS for encryption
—
SDES: Only use SDES (SRTP) for encryption
—
NONE: Encryption is disabled
•
The feature was tested using the following CISCO components:
—
Cisco CUCM Version 9.0
—
Cisco TPC Version 2.3
Table I-7
TIP Compatibility - Prefer TIP
Prefer TIP
Content Receiver
HDX / ITP
CTS
Content
Sender
HDX / ITP
Content Media:
Flow Control:
H.264
H.323 via H.239
SIP via BFCP
TIP via Auto Collaboration
CTS
Содержание RealPresence 2000
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