Cisco 300-815 問題練習

Question No : 1
What is first preference condition matched in a SIP-enabled incoming dial peer?

• A.incoming uri
• B.target carrier-id
• C.answer-address
• D.incoming called-number

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正解:
Explanation:
Reference: https://www.cisco.com/c/en/us/support/docs/voice/ip-telephony-voice-over-ip-voip/211306-In-Depth-Explanation-of-Cisco-IOS-and-IO.html#anc8

Question No : 2
Refer to the exhibit.



While troubleshooting call failures on the Cisco Unified Border Element, an administrator notices that messages are being sent to the service provider, but there is no response. The administrator later learns that this SIP provider does not support PRACK .
Which header should be removed from the SIP message to resolve this issue?

• A.Content-Disposition: session: handling=required
• B.Require 100rel
• C.Contact <sip: [email protected]:5060>
• D.Content-Type: application/sdp

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正解:

Question No : 3
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?

• A.Enable SIP ReMXX Options on the SIP profile.
• B.Enable Send send-receive SDP in mid-call INVITE on the SIP profile.
• C.Change Session Refresh Method on the SIP profile to INVIT
• D.Increase Retry INVITE to 20 seconds on the SIP profile.

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正解:

Question No : 4
A user requests a feature to send an active call to the mobile phone number on the physical phone.
As an administrator, what should be configured in the Cisco UCM to accomplish this?

• A.A Remote Destination Profile having the same extension as the Mobile phone's number adds the physical phone's Directory Number to the RDP as a Remote Destination. Add the softkey "Mobility" to the physical phone's softkey template.
• B.A Remote Destination Profile having the same extension as the physical phone's Directory Number, add the mobile phone number to the RDP as a Remote Destination. Add the softkey "Mobility" to the physical phone's softkey template.
• C.A Remote Destination Profile having the same extension as the Mobile phone's number adds the physical phone's Directory Number to the RDP as a Remote Destination. Add the softkey "Join" to the physical phone's softkey template
• D.A Remote Destination Profile having the same extension as the physical phone's Directory Number, add the mobile phone number to the RDP as a Remote Destination. Add the softkey "Join" to the physical phone's softkey template.

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正解:

Question No : 5
Which configuration element of a hunt group allows for changing Calling Party Transformations settings?

• A.line group
• B.hunt pilot
• C.route group
• D.hunt list

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正解:
Explanation:
Reference: https://community.cisco.com/t5/ip-telephony-and-phones/call-alerting-on-hunt-group-as-shared-line/td-p/2658015

Question No : 6
An administrator is troubleshooting call failures on an H.323 gateway via the CLI.
To see signaling for media and call setup, which debug must the Administrator turn on?

• A.debug
• B.323 messages
• C.debug
• D.225 asn1
• E.debug
• F.246 asn 1
• G.debug
• H.225 media
• I.debug
• J.323 asn 1

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正解:

Question No : 7
A support engineer is troubleshooting a voice network.
When conducting a search for call setup details related to calling search space issues, which trace files should be investigated?

• A.CallManager traces
• B.CTI Manager traces
• C.Cisco IP Manager Assistant
• D.Call logs

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正解:

Question No : 8
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 h245-signal
• B.dtmf-relay rtp-nte
• C.dtmf-relay cisco-rtp
• D.dtmf-relay sip-kpml

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正解:

Question No : 9
Where is the dtmf-relay command configured on Cisco Unified Border Element?

• A.in the voice-class VoIP configuration
• B.in the VoIP dial peer
• C.in global SIP configuration
• D.in the VoIP or POTS dial peers

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正解:
Explanation:
Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/dtmf-relay.html

Question No : 10
An engineer has two cisco UCM Clusters and wants to integrate them using ILS with TLS certificates. Cluster A (pub and 1 subscriber) will be the hub, and Cluster B (pub and 1 subscriber) will be the spoke. Both Clusters have self-signed certificates. The engineer has exchanged Publisher A and subscriber B Tomcat certificates, but the connection fails .
What is the cause of the failure?

• A.The password is incorrect.
• B.Cluster IDs are not unique.
• C.The tomcat certificate from Cluster B must be the publisher.
• D.The engineer needs to exchange the CallManager certificate.

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正解:

Question No : 11
An administrator is working on an issue between the customer s Cisco Unified Border Element and the service provider. The provider only wants to see mid-call signaling from the Cisco Unified Border Element for fax calls .
Which command must be configured on Cisco Unified Border Element?

• A.midcall-signallng passthru
• B.midcall-signaling preserve-codec
• C.no update-callerid
• D.midcall-signaling passthru media-change

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正解:

Question No : 12
An engineer is configuring a call park feature in Cisco Unified Communications Manager Express .
Which command does the engineer use to ensure that the call is reverted to the user after 60 seconds?

• A.R2(config-ephone-dn)#park reservation-group 60
• B.R2(config-ephone-dn)#park-slot timeout 60 limit 2 recall alternate 3002
• C.R2(config-ephone-dn)#park reservation-group 1
• D.R2(config-ephone-dn)#park-slot timeout 30 limit 2 recall alternate 3002

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正解:

Question No : 13
A customer is using a SIP trunk to route calls to ITSP to decrease the possibility of downtime, the customer invested in a failover device.
How does the customer ensure reachability to ITSP, so that if one device on ITSP fails, the calls will be routed to another device?

• A.Enable transmit security status on the SIP security profile
• B.Enable ANAT on the SIP profile.
• C.Monitor the link using network management toots, and if it fails, manually change the routing to another working device.
• D.Enable SIP Option Ping on the SIP profile.

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正解:

Question No : 14
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.711 A-law
• B.711 U-law
• C.729r8
• D.729br8

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正解:

Question No : 15
Cisco UCM has 100,000 entries in the database learned through the ILS Service. Parameter ILS Max Number of Learned Objects in Database value is set to 100,000 .
What will happen to learned data when the service parameter value is reduced to 50,000?

• A.Cisco UCM does not write additional ILS learned objects to the database and will delete the first 50,000 entries learned to keep it to the service parameter value.
• B.Cisco UCM does not write additional ILS learned objects to the database and will delete the last 50,000 entries learned to keep it to the service parameter value.
• C.Cisco UCM does not write additional ILS learned objects to the database and keeps the existing database entries.
• D.Cisco UCM will overwrite an entry for newly learned data and keep the parameter value at 100,000.

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正解: