Cisco CCNP Collaboration 300-815 Questions & Answers

• Question 111:

  A new deployment is using MVA for a specific user on the sales team, but the user is having issues when dialing DTMF. Which DTMF method must be configured in resolve the issue?

  A. in-band

  B. out-of-band

  C. gateway

  D. channel

  Correct Answer: B

• Question 112:

  Refer to the exhibit.

  

  An engineer is troubleshooting a call-establishment problem between Cisco Unified Border Element and Cisco UCM. Which command set corrects the issue?

  A. SIP binding in SIP configuration mode: voice service voip sip bind control source-interface GigabitEthernet0/0/1 bind media source-interface GigabitEthernet0/0/1

  B. SIP binding in dial-peer configuration mode: dial-peer voice 100 voip voice-class sip bind control source-interface GigabitEthernet0/0/0 voice-class sip bind media source-interface GigabitEthernet0/0/0

  C. SIP binding in dial-peer configuration mode: dial-peer voice 300 voip voice-class sip bind control source-interface GigabitEthernet0/0/1 voice-class sip bind media source-interface GigabitEthernet0/0/1

  D. SIP binding in SIP configuration mode: voice service voip sip bind control source-interface GigabitEthernet0/0/0 bind media source-interface GigabitEthernet0/0/0

  Correct Answer: B

• Question 113:

  Refer to the exhibit.

  

  A call made through the Cisco Unified Border Element to pilot 2000 is failing. What is causing the call to fail?

  A. The Cisco Unified Border Element is not receiving a response to its OPTION keepalives.

  B. The destination pattern is incorrect for the dialed number.

  C. VAD was not disabled on the outgoing dial peer.

  D. No codecs are configured on the dial peers.

  Correct Answer: D

• Question 114:

  When a third-party SIP Phone System is dialed inbound across a Cisco Unified Border Element, DTMF is failing. The third-party vendor accepts only out-of-band DTMF. Which configuration should be added to the outgoing dial peer to resolve this issue?

  A. dtmf-relay rtp-nte

  B. dtmf-relay cisco-rtp

  C. dtmf-relay h245-signal

  D. dtmf-relay sip-kpml

  Correct Answer: C

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

• Question 115:

  Due to a shortage of physical interfaces on a device, the administrator requires that a loopback for RTP is used. Which command is required when using a loopback interface for RTP?

  A. voice-class sip early-offer forced

  B. voice-class sip bind control source-interface Loopback0

  C. voice-class sip bind media source-interface Loopback0

  D. voice-class sip resource priority mode passthrough

  Correct Answer: C

• Question 116:

  An administrator is implementing a new dial-plan on Cisco Unified Border Element. The administrator must ensure that incoming dial-peers are matched based on the IP address from where the incoming request originates. Which dial-peer configuration should be applied to accomplish this requirement?

  A. dial-peer voice 1 voip incoming uri to

  B. dial-peer voice 1 voip incoming called-number

  C. dial-peer voice 1 voip incoming uri via

  D. dial-peer voice 1 voip incoming uri request

  Correct Answer: C

• Question 117:

  Refer to the exhibit.

  

  The Cisco Unified Border Element receives an INVITE matching inbound dial peer 5002. The outbound dial peer supports only iLBC, and a Local Transcoding Interface is allocated. Based on the configuration and SDP from the INVITE message, which codec is chosen by Cisco Unified Border Element for the inbound call leg?

  A. G.729r8

  B. G.711 A-law

  C. G.711 U-law

  D. G.729br8

  Correct Answer: C

• Question 118:

  Refer to the exhibit.

  

  An engineer is troubleshooting an issue where inbound calls to Cisco UCM with early media fail to establish. While investigating the issue, the engineer finds that Cisco UCM is set to require a PRACK, but the Cisco Unified Border Element is not sending it. Which command is causing this issue?

  A. voice-class midcall-signaling block

  B. voice-class sip rel1xx disable

  C. voice-class sip early-media update block

  D. voice-class sip conn-reuse

  Correct Answer: B

• Question 119:

  Refer to the exhibit.

  

  Outbound calls to the service provider cause intermittent errors due to a codec mismatch. The internal network sends early offer SDP that contains only G.711 A-law. The service provider reports that some destinations support only G.711 A-law while others support only iLBC. The service provider also allows only 20 active calls at a time. Which configuration allows successful media negotiation for all calls using outbound dial peers 5002 and 5003?

  A. dial-peer voice 5002 voip codec g711alaw ilbc ! dial-peer voice 5003 voip codec g711alaw ilbc

  B. dial-peer voice 5002 voip voice-class codec 101 offer-all ! dial-peer voice 5003 voip voice-class codec 101 offer-all

  C. dial-peer voice 5002 voip voice-class codec 101 ! dial-peer voice 5003 voip voice-class codec 101

  D. dial-peer voice 5002 voip codec g711alaw ! dial-peer voice 5003 voip codec ilbc

  Correct Answer: B

• Question 120:

  Refer to the exhibit.

  

  An administrator is troubleshooting a problem in which some outbound calls from an internal network to the Internet telephony service provider are not getting connected, but some others connect successfully. The firewall team found that some call attempts on port 5060 came from an unrecognized IP that has not been defined in the firewall rule. What should the administrator configure in the Cisco Unified Border Element to fix this issue?

  A. use of port 5061 for SIP secure

  B. access list allowing the firewall IP

  C. bind signaling and media to the loopback interface

  D. ip prefix-list to filter the unwanted IP address

  Correct Answer: C