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Cisco 300-815 Exam
Implementing Cisco Advanced Call Control and Mobility Services (CLASSM) (Page 5 )

Updated On: 12-Feb-2026
Page 5 of 50
PDF with 245 Questions

The SIP session refresh timer allows the RTP session to stay active during an active call. The Cisco UCM sends either SIP-INVITE or SIP-UPDATE messages in a regular interval of time throughout the active duration of the call. During a troubleshooting session, the engineer finds that the Cisco UCM is sending SIP-UPDATE as the SIP session refresher, and the engineer would like to use SIP-INVITE as the session refresher.
What configuration should be made in the Cisco UCM to achieve this?

  1. Change Session Refresh Method on the SIP profile to INVITE.
  2. Increase Retry INVITE to 20 seconds on the SIP profile.
  3. Enable Send send-receive SDP in mid-call INVITE on the SIP profile.
  4. Enable SIP Rel1XX Options on the SIP profile.

Answer(s): A


Reference:

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-border- element/213843-troubleshoot-session-refresh-on-cube.html





Refer to the exhibit. An engineer is troubleshooting an issue where inbound calls are failing after they are transferred. The provider reports that UPDATE is not supported, and this is causing the calls to fail.
Which command should resolve this issue?

  1. no midcall-signaling passthru
  2. no update-callerid
  3. no contact-passing
  4. rel1xx require "100rel"

Answer(s): B





Refer to the exhibit. An administrator has configured a SIP trunk between two Cisco UCM clusters. For calls that should use the trunk, the calls fail with a fast busy. The administrator checks the Cisco CallManager SDL traces and found that the cluster to which the calling device is registered never sends an INVITE to the destination cluster. The administrator also verifies that all nodes from both clusters are powered on, and the CallManager service is running. How is this issue resolved?

  1. The administrator must associate the route pattern with a calling search space the device can dial.
  2. The administrator needs to enable OPTIONS pings on the SIP trunks for both clusters.
  3. The administrator must allow connectivity so that TCP connections do not fail between the nodes.
  4. The administrator needs to disable OPTIONS pings on the SIP trunks for both clusters.

Answer(s): C





Refer to the exhibit. Regions have been configured for all major branches based on the available circuit bandwidth. Some calls from Region A endpoints to Region B endpoints are failing to connect. How is the issue resolved?

  1. Update the calling search space for affected endpoints to none.
  2. Update all regions to 8 kbps maximum audio bitrate.
  3. Increase the number of available media termination points.
  4. Add a media resource to transcode between available capabilities.

Answer(s): D


Reference:

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications- manager-callmanager/200788-Call-Recording-Basic-Configuration-and-T.html



55697959.007 |12:20:50.913 |AppInfo |

RouteListCdrc::createPartyTransformedCcSetupReqMsg - before DAapplyCdpnXform() preXformCdpn=11112222 preTag=SUBSCRIBER prePos=11112222 crCdpnMask=33334444 crPrefixDigit= crDDI=2
55697959.008 |12:20:50.913 |AppInfo |
RouteListCdrc::createPartyTransformedCcSetupReqMsg - after DAapplyCdpnXform() xformCdpn=33334444 xformTag=SUBSCRIBER xformPos=11112222
55697959.009 |12:20:50.913 |AppInfo |RouteListCdrc::transformed cdpn (without unconsumpt digits) = 33334444, unconsumed digit=

Refer to the exhibit.
Which INVITE is sent to 10.10.100.123 as a result of this log?

  1. 55698034.001 |12:20:50.922 |AppInfo |SIPTcp - wait_SdlSPISignal: Outgoing SIP TCP
    message to 10.10.100.123 on port 5060 index 41
    [95992364,NET]
    INVITE sip:33334444@10.10.100.123:5060 SIP/2.0
    Via: SIP/2.0/TCP 10.122.200.50:5060;branch=z9hG4bK268d6e4e48f3ae From: "1000" <sip:1000@10.122.200.50>;tag=32412716~41f7
    To: <sip:33334444@10.10.100.123>
    Date: Thu, 01 Apr 2021 17:20:50 GMT
    Call-ID: 99878a80-66100f2-265e57-67071d0a@10.122.200.50
    Supported: timer,resource-priority,replaces
    Min-SE: 1800
    User-Agent: Cisco-CUCM12.0
  2. 55698034.001 |12:20:50.922 |AppInfo |SIPTcp - wait_SdlSPISignal: Outgoing SIP TCP
    message to 10.10.100.123 on port 5060 index 41
    [95992364,NET]
    INVITE sip:33334444@10.10.100.123:5060 SIP/2.0
    Via: SIP/2.0/TCP 10.122.200.50:5060;branch=z9hG4bK268d6e4e48f3ae From: "11112222" <sip:11112222@10.122.200.50>;tag=32412716~41f7
    To: <sip:11112222@10.10.100.123>
    Date: Thu, 01 Apr 2021 17:20:50 GMT
    Call-ID: 99878a80-66100f2-265e57-67071d0a@10.122.200.50
    Supported: timer,resource-priority,replaces
    Min-SE: 1800
    User-Agent: Cisco-CUCM12.0
  3. 55698034.001 |12:20:50.922 |AppInfo |SIPTcp - wait_SdlSPISignal: Outgoing SIP TCP
    message to 10.10.100.123 on port 5060 index 41
    [95992364,NET]
    INVITE sip:11112222@10.10.100.123:5060 SIP/2.0
    Via: SIP/2.0/TCP 10.122.200.50:5060;branch=z9hG4bK268d6e4e48f3ae From: "1000" <sip:1000@10.122.200.50>;tag=32412716~41f7
    To: <sip:11112222@10.10.100.123>
    Date: Thu, 01 Apr 2021 17:20:50 GMT
    Call-ID: 99878a80-66100f2-265e57-67071d0a@10.122.200.50
    Supported: timer,resource-priority,replaces
    Min-SE: 1800
    User-Agent: Cisco-CUCM12.0
  4. 55698034.001 |12:20:50.922 |AppInfo |SIPTcp - wait_SdlSPISignal: Outgoing SIP TCP
    message to 10.10.100.123 on port 5060 index 41
    [95992364,NET]
    INVITE sip:11112222@10.10.100.123:5060 SIP/2.0
    Via: SIP/2.0/TCP 10.122.200.50:5060;branch=z9hG4bK268d6e4e48f3ae From: "11112222" <sip:11112222@10.122.200.50>;tag=32412716~41f7
    To: <sip:11112222@10.10.100.123>
    Date: Thu, 01 Apr 2021 17:20:50 GMT
    Call-ID: 99878a80-66100f2-265e57-67071d0a@10.122.200.50
    Supported: timer,resource-priority,replaces
    Min-SE: 1800

    User-Agent: Cisco-CUCM12.0

Answer(s): C






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