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Home Cisco® 300-815

Cisco® 300-815 Exam Practice Questions (P. 2)

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Question #6
End users at a new site report being unable to hear the remote party when calling or being called by users at headquarters. Calls to and from the PSTN work as expected. To investigate the SIP signaling to troubleshoot the problem, which field can provide a hint for troubleshooting?
  1. A
    Contact: header of the 200 OK response
  2. B
    Allow: header if the 200 OK response
  3. C
    o= line of SDP content
  4. D
    c= line of SDP content

Correct Answer:
C

Question #7
Why would RTP traffic that is sent from the originating endpoint fail to be received on the far endpoint?
  1. A
    The far end connection data (c=) in the SDP was overwritten by deep packet inspection in the call signaling path.
  2. B
    Cisco Unified Communications Manager invoked media termination point resources.
  3. C
    The RTP traffic is arriving beyond the jitter buffer on the receiving end.
  4. D
    A firewall in the media path is blocking TCP ports 16384-32768.

Correct Answer:
D

Question #8
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?
  1. A
    debug H.323 messages
  2. B
    debug H.225 asn1
  3. C
    debug H.246 asn 1
  4. D
    debug H.225 media
  5. E
    debug H.323 asn 1

Correct Answer:
B

Question #9
What is first preference condition matched in a SIP-enabled incoming dial peer?
  1. A
    incoming uri
  2. B
    target carrier-id
  3. C
    answer-address
  4. D
    incoming called-number

Correct Answer:
A
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 #10
Cisco SIP IP telephony is implemented on two floors of your company. Afterward, users report intermittent voice issues in calls established between floors. All calls are established, and sometimes they work well, but sometimes there is one-way audio or no audio. You determine that there is a firewall between the floors, and the administrator reports that it is allowing SIP signaling and UDP ports from 20000 to 22000 bidirectionally. What are two possible solutions? (Choose two.)
  1. A
    Go to the SIP profile assigned to these IP phones in Cisco Unified CM and change the range of media ports to 16384-32767
  2. B
    Ask the firewall administrator to change the ports to TCP.
  3. C
    Ask the firewall administrator to change the range of UDP ports to 16384-32767.
  4. D
    Go to the SIP profile assigned to these IP phones in Cisco Unified CM and change the range of media ports to 20000-22000.
  5. E
    Go to System Parameters in Cisco Unified Communications Manager and change the range of media ports to 20000-22000.

Correct Answer:
AC
Reference:
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/port/9_1_1/CUCM_BK_T2CA6EDE_00_tcp-port-usage-guide-91/
CUCM_BK_T2CA6EDE_00_tcp-port-usage-guide-91_chapter_01.html

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