300-085 · Question #196
A user calla from one Cisco Jabber for Windows softphone client to another. After the call is established, the desktop share button .s greyed out. Which two device configurations are possible causes…
The correct answer is C. On the CSF device or SIP profile, the Allow Presentation Sharing Using BFCP option is D. On the CSF device, the Use Trusted Relay Point option is set to On. The desktop share button being greyed out in Cisco Jabber indicates that BFCP presentation sharing is disabled or a relay point configuration is blocking the media path required for sharing.
Question
A user calla from one Cisco Jabber for Windows softphone client to another. After the call is established, the desktop share button .s greyed out. Which two device configurations are possible causes for this issue? (Choose two)
Options
- AOn the CSF device, the Ignore Presentation Indicators option is checked.
- BOn the SIP profile for the device, the Allow multiple codecs in answer SDP option is unchecked.
- COn the CSF device or SIP profile, the Allow Presentation Sharing Using BFCP option is
- DOn the CSF device, the Use Trusted Relay Point option is set to On.
- EOn the SIP profile for the device, the Allow iX Application Media option is unchecked.
How the community answered
(49 responses)- A10% (5)
- B4% (2)
- C65% (32)
- E20% (10)
Why each option
The desktop share button being greyed out in Cisco Jabber indicates that BFCP presentation sharing is disabled or a relay point configuration is blocking the media path required for sharing.
The 'Ignore Presentation Indicators' option affects how RPID/connected line presentation information is displayed and does not impact BFCP desktop sharing capability.
The 'Allow multiple codecs in answer SDP' option affects codec negotiation behavior and does not control whether BFCP presentation sharing is advertised or available.
The 'Allow Presentation Sharing Using BFCP' option on the CSF device or its SIP profile must be enabled - if it is unchecked, CUCM will not include BFCP media attributes in the SDP, preventing the sharing feature from being negotiated and leaving the button unavailable.
Setting 'Use Trusted Relay Point' to On forces all media through a Media Termination Point or RSVP agent, which breaks the direct media channel required for BFCP-based desktop sharing and causes the share button to appear greyed out.
The 'Allow iX Application Media' option enables the iX channel for Cisco Spark/Webex Teams integration and is unrelated to BFCP-based desktop sharing in Jabber.
Concept tested: BFCP desktop sharing configuration on Cisco Jabber CSF devices
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_0100111.html
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