Polycom® RMX 1800 Administrator’s Guide
4-2 Polycom, Inc.
SIP BFCP Content Capabilities
SIP Clients supporting BFCP over UDP, when connected to conferences on the
Collaboration Server, can share Content with endpoints supporting the following Content
sharing protocols:
BFCP/TCP
BFCP/UDP
H.323/ H.239
Guidelines:
For SIP Clients that support both BFCP/TCP and BFCP/UDP:
The preferred protocol is BFCP/UDP.
When used in Cascading conferences, the Cascade Link must be H.323.
BFCP/UDP is supported in both IPv4 addressing modes.
BFCP utilizes an unsecured channel (port 60002/TCP) even when SIP TLS is enabled.
BFCP capabilities are by default declared to all endpoints. If, however, the endpoint
identity is hidden by a proxy server, these capabilities will not be declared by the
Collaboration Server. Capabilities declaration is controlled by the
ENABLE_SIP_PPC_FOR_ALL_USER_AGENT System Flag.
The default value of the ENABLE_SIP_PPC_FOR_ALL_USER_AGENT System Flag is
YES resulting in BFCP capability being declared with all vendors’ endpoints unless it is
set to NO. When set to NO, the Collaboration Server will declare BFCP capabilities to
Polycom and Avaya endpoints.
•The ENABLE_FLOW_CONTROL_REINVITE System Flag should be set to NO when
SIP BFCP is enabled.
If these System Flags don’t exist in the system, they must be manually added. For more
information see "Modifying System Flags” on page20-1.
BFCP capabilities are not supported in Microsoft ICE environment.
Dial-out Connections:
For dial-out connections to SIP Clients, BFCP/UDP protocol can be given priority by
adding the adding the SIP_BFCP_DIAL_OUT_MODE System Flag to system.cfg and
setting its value to UDP.
The Collaboration Server’ s Content sharing determined by the System Flag’s settings and
SIP Client capabilities are summarized in Table 4-1.
Table 4-1 System Flag - SIP_BFCP_DIAL_OUT_MODE
Flag Value
SIP Client: BFCP Support
UDP TCP UDP and TCP
AUTO
(Default) BFCP/UDP selected as
Content sharing
protocol.
BFCP/TCP selected as
Content sharing
protocol. BFCP/UDP selected as
Content sharing
protocol.
UDP Cannot share Content.