Suppressing Video in SDP: Cisco UCM Configuration
Question
Due to service provider restriction, Cisco UCM cannot send video in the SDP.
Which two options on Cisco UCM are configured to suppress video in the SDP in outgoing invites? (Choose two.)
Answers
Explanations
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A. B. C. D. E.AD.
https://community.cisco.com/t5/ip-telephony-and-phones/cucm-region-vs-location-video-bandwidth/td-p/1488224 https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/voi-audio-forced.htmlWhen a call is initiated between two endpoints, the Session Description Protocol (SDP) is used to negotiate the media capabilities, including audio and video, between the endpoints. In some cases, the service provider may have restrictions that prevent video from being sent in the SDP. In such cases, Cisco Unified Communications Manager (UCM) can be configured to suppress video in the SDP in outgoing invites.
Two options to suppress video in the SDP in outgoing invites are:
A. Set Video Bandwidth in the Region settings to 0: This option disables video transmission between endpoints by setting the video bandwidth to 0. To implement this, you need to configure a region between the two endpoints and set the Video Bandwidth field to 0 in the region settings. This option completely disables video transmission, and it is not recommended if you want to enable video transmission in the future.
B. Check the Send send-receive SDP in mid-call INVITE check box on the SIP trunk SIP profile: This option suppresses video transmission only in the initial invite message, but allows video to be transmitted in mid-call invites. To implement this, you need to check the "Send send-receive SDP in mid-call INVITE" check box on the SIP trunk SIP profile. This option is preferred if you want to allow video transmission in the future, but need to suppress it for initial invites due to service provider restrictions.
C. Change the Video Capabilities dropdown on the endpoint to Disabled: This option disables video transmission from the endpoint, and it is not specific to suppressing video in the SDP. It only prevents the endpoint from sending video, but does not suppress video in the SDP in outgoing invites.
D. Add the audio forced command to voice service voip on the Cisco Unified Border Element: This option is not used to suppress video in the SDP in outgoing invites. This command is used to force a call to be established with audio-only even if video capabilities are negotiated in the SDP.
E. Check the Retry Video Call as Audio on the SIP trunk: This option is used to retry a failed video call as an audio-only call, but it does not suppress video in the SDP in outgoing invites.
Therefore, the correct options to suppress video in the SDP in outgoing invites are A and B.
