When do media negotiations occur for calls between two phones registered to Webex Calling?

When do media negotiations occur for calls between two phones registered to Webex Calling?

• A. When the call is initiated
• B. During the SDP exchange
• C. After the call is answered
• D. At the end of the call

Answer: (B)

Media negotiations occur during the Session Description Protocol (SDP) exchange, which is a crucial step in establishing a multimedia session between two endpoints. When two phones registered to Webex Calling initiate a call, they need to agree on various parameters for the media stream, such as codecs, media types (audio, video), and other relevant features. This negotiation process takes place right after the initial signaling to set up a call but before the actual media streams are sent. During the SDP exchange, both parties send and receive messages that include their capabilities and preferences, allowing them to reach an agreement on how to handle the media for the call. This step is essential for ensuring that both endpoints can successfully communicate without compatibility issues. The other options describe stages that either occur before (the call initiation) or after (the call is answered and at the end of the call) the media negotiation process, making them not appropriate for when media negotiations specifically take place.

Media negotiations occur during the Session Description Protocol (SDP) exchange, which is a crucial step in establishing a multimedia session between two endpoints. When two phones registered to Webex Calling initiate a call, they need to agree on various parameters for the media stream, such as codecs, media types (audio, video), and other relevant features.

This negotiation process takes place right after the initial signaling to set up a call but before the actual media streams are sent. During the SDP exchange, both parties send and receive messages that include their capabilities and preferences, allowing them to reach an agreement on how to handle the media for the call. This step is essential for ensuring that both endpoints can successfully communicate without compatibility issues.

The other options describe stages that either occur before (the call initiation) or after (the call is answered and at the end of the call) the media negotiation process, making them not appropriate for when media negotiations specifically take place.