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Implementing Cisco Advanced Call Control and Mobility Services (CLASSM) Questions 76–80 (page: 17)

Updated On: 10-Feb-2026

A newly deployed site in Pennsylvania uses SIP-to-SIP legs on a Cisco Unified Border Element. The administrator wants to match the incoming dial peer based on the calling number.
Which configuration is needed in the dial-peer?

  1. answer-address
  2. incoming called-number
  3. destination calling
  4. destination-pattern

Answer(s): A


Reference:

https://www.cisco.com/c/en/us/support/docs/voice/call-routing-dial-plans/14074-in-dial-peer- match.html



After a new SIP trunk is configured from a third-party SIP trunk provider, the call does not seem to work. A troubleshooting tool and a trace log from the Cisco Unified Border Element shows that there is communication with the provider and that it is sending out SDP information in the 2XX response.
Why is the call not working?

  1. The Cisco Unified Border Element does not have any PDVM resources to terminate the SIP trunk assigned.
  2. The SIP provider expects a delayed offer.
  3. The SIP provider expects an early offer.
  4. The Cisco Unified Border Element must be licensed for third-party SIP trunks.

Answer(s): C





Refer to the exhibit. An engineer deploys a Cisco Unified Border Element for SIP trunk interconnection to an ITSP. The engineer performs test calls but there is no audio when the called party picks up the phone.
What must the engineer do to resolve the issue?

  1. Disable SIP User Agent bind status (media).
  2. Decrease the SIP max-forwards value to 16.
  3. Disable SIP early-media for 180 responses with SDP.
  4. Enable Check media source packets.

Answer(s): D



An engineer is configuring a Cisco Unified Border Element. The SIP ITSP requires a DNIS of 10-digits and DTMF tones sent in the RTP stream on the outbound leg of a call.
Which code completes this configuration?





Answer(s): C



The same digits sent in OOB, as well as in-band on the Cisco Unified Border Element, are being interpreted as duplicate digits by the receiving end.
Which configuration must an engineer implement to resolve this issue?

  1. DTMF Relay SIP-KPML
  2. DTMF Relay SIP-Notify
  3. DTMF Relay RTP-nte
  4. DTMF Relay Digit-Drop

Answer(s): D


Reference:

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-border- element/200412-DTMF-Relay-and-Interworking-on-CUBE.html



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