210-065 · Question #37
Refer to the exhibit. A network engineer configures a Cisco Unified Communications Manager and VCS integration via a SIP trunk. Endpoint A is able to conduct video calls to Endpoint B. When Endpoint…
The correct answer is D. BFCP is not enabled. BFCP (Binary Floor Control Protocol) must be enabled on the SIP trunk to negotiate a separate content channel so that presentation video is routed to the dedicated presentation display rather than the main screen.
Question
Refer to the exhibit. A network engineer configures a Cisco Unified Communications Manager and VCS integration via a SIP trunk. Endpoint A is able to conduct video calls to Endpoint B. When Endpoint A attempts to share presentation content with Endpoint B, Endpoint B sees the presentation video on the main screen rather than on the presentation display. What is the cause?
Exhibit
Options
- AThe default MTP telephony payload is incorrect.
- BThe SIP trunk is not running on all active Cisco Unified Communications Manager nodes.
- CMTP is not forced to be required.
- DBFCP is not enabled.
- EThe MTP preferred codec is incorrect for content presentation.
How the community answered
(33 responses)- A24% (8)
- B6% (2)
- C15% (5)
- D52% (17)
- E3% (1)
Why each option
BFCP (Binary Floor Control Protocol) must be enabled on the SIP trunk to negotiate a separate content channel so that presentation video is routed to the dedicated presentation display rather than the main screen.
The MTP telephony payload setting relates to audio codec negotiation, not to the routing or display of a separate video presentation stream.
Running the SIP trunk on all active CUCM nodes affects call redundancy and availability, but does not influence how presentation content is streamed or assigned to a display.
Forcing MTP to be required inserts a media termination point for audio processing and has no effect on dual-stream video or presentation channel negotiation.
BFCP is the SIP protocol extension that negotiates a separate content-sharing channel between endpoints. Without BFCP enabled on the SIP trunk between CUCM and VCS, the endpoints cannot signal a distinct presentation stream, so the shared content is transmitted within the main video channel and rendered on the primary display instead of the designated presentation screen.
The MTP preferred codec setting affects audio quality negotiation, not the separate content video channel used for BFCP-based presentation sharing.
Concept tested: BFCP enabling dual-stream presentation over SIP trunk
Source: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/12_5_1/systemConfig/cucm_b_system-configuration-guide-1251/cucm_b_system-configuration-guide-1251_chapter_01001101.html
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