Refer to the exhibit. Which outgoing m-line SDP is sent to Cisco UCM after matching the appropriate dial peers via Cisco Unified Border Element?

This option proposes G.711 U-law, G.711 A-law, and then G.729, which is a different codec preference order than the correct answer.

The SDP m-line m=audio 16550 RTP/AVP 18 0 signifies that the Cisco Unified Border Element (CUBE) is offering G.729 (payload type 18) as the most preferred audio codec, followed by G.711 U-law (payload type 0), to Cisco UCM. This codec order is determined by the codec command configured within the CUBE's outgoing dial-peer towards UCM.

This option proposes G.711 A-law, G.711 U-law, and then G.729, which represents a different codec preference order and specific codecs than the correct answer.

This option only offers G.729 (payload type 18) and omits G.711 U-law, which is a less flexible codec offering compared to offering both codecs and might not match the intended CUBE configuration for UCM.