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Cisco 300-815 Exam Questions
Implementing Cisco Advanced Call Control and Mobility Services (CLASSM) (Page 6 )

Updated On: 19-Apr-2026
Page 6 of 50
PDF with 245 Questions



Refer to the exhibit. A Cisco Unified Border Element continues to send 180/183 with the required: 100rel header to Cisco UCM, and the call eventually disconnects. How is the issue resolved?

  1. Disable "SIP Rel1XX Options" and "Early Offer Support" on the SIP Profile Configuration Page in Cisco UCM.
  2. Enable "SIP Rel1XX Options" and "Early Offer Support" on the SIP Profile Configuration Page in Cisco UCM.
  3. Disable "Send send-receive SDP in mid-call INVITE" on the SIP Profile Configuration Page in Cisco UCM.
  4. Enable "Early Offer support for voice and video calls" on the SIP Profile Configuration Page in Cisco UCM.

Answer(s): D





Refer to the exhibit. An engineer is troubleshooting an issue with the caller not hearing a PSTN announcement before the SIP call has completed setup. How must the engineer resolve this issue using the reliable provisional response of the SIP?

  1. voice service voip sip no rel1xx
  2. sip-ua disable-early-media 180
  3. voice service voip sip rel1xx require 100rel
  4. voice service voip sip send 180 sdp

Answer(s): C



What are two functions of the metadata in SIP recording? (Choose two.)

  1. includes the details of the application media stream
  2. contains the cryptographic context of the SRTP passthrough calls
  3. identifies the session and media association time
  4. carries the Agent Statistics Report
  5. carries the communication session data (audio and video calls) that describes the call to the recording server

Answer(s): C,E


Reference:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/ios-xe/config/ios-xe-book/m_voi-cube- sip-rec-recorder.pdf





Refer to the exhibit. Calls from users to the PSTN in an organization get disconnected with a 408 Request Timeout when the called party is unavailable to pick up the call.
Which solution must be used to resolve this challenge?

  1. Configure midcall-signaling preserve-codec.
  2. Choose "Send PRACK" if 1xx contains SDP in the SIP profile.
  3. Configure midcall-signaling passthru media-change.
  4. Choose "Send PRACK for all 1xx Messages" in the SIP profile.

Answer(s): D



Users report silence on the line when they try to connect to external voice numbers. The company is using Cisco 8865 phones with Cisco UCM connected to a gateway with two T1 circuits. The MGCP server seems to be responding.
Which action must the engineer take to begin to investigate the media for this type of issue?

  1. Run RTMP on the Cisco router.
  2. Verify that the MGCP service is running under serviceability in Cisco UCM.
  3. Run the debug mgcp media command on the Cisco router.
  4. Run the debug H.323 gateway command on the Cisco router.

Answer(s): C



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