Implementing Cisco Advanced Call Control and Mobility Services (CLACCM) — Question 10

End users at a new site report being unable to hear the remote party when calling or being called by users at headquarters. Calls to and from the PSTN work as expected. To investigate the SIP signaling to troubleshoot the problem, which field can provide a hint for troubleshooting?

Answer options

• A. Contact: header of the 200 OK response
• B. Allow: header if the 200 OK response
• C. o= line of SDP content
• D. c= line of SDP content

Correct answer: D

Explanation

The c= line of SDP content specifies the connection information for the media session, which is crucial for establishing audio paths. If there are issues with this line, it could explain why users cannot hear each other. The other options may provide useful information but are less directly related to the audio connection problem.