cisco 300-815 Exam Questions

Questions for the 300-815 were updated on : Dec 07 ,2025

Page 1 out of 17. Viewing questions 1-15 out of 242

Question 1

Refer to the exhibit.

Refer to the exhibit. During a troubleshooting session, an engineer was presented with this call flow
output diagram after a user reported issues with a call via the SIP ITSP to a counterpart. What is
occurring with this call flow?

  • A. The user is experiencing no-way audio after resuming the call from hold.
  • B. The user is experiencing one-way audio after resuming the call from hold.
  • C. The user call was terminated due to network issues.
  • D. The user call proceeded normally after resuming from hold.
Answer:

A

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Question 2

A user has a problem calling a specific PSTN number. An engineer investigates the issue on a Cisco
UCM server and a Cisco Unified Border Element router, and discovers that the ITSP rejects the
outbound SIP INVITE with a 422 Session Timer Too Small SIP message. What must the engineer do to
resolve the issue?

  • A. Decrease the SIP Session Expires Timer service parameter in Cisco UCM.
  • B. Decrease the Min-SE SIP header timer on the appropriate Cisco Unified Border Element dial peer.
  • C. Increase the Min-SE SIP header timer on the appropriate Cisco Unified Border Element dial peer.
  • D. Increase the SIP Session Expires Timer service parameter in Cisco UCM.
Answer:

C

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Question 3

A company wants to optimize the ability to answer the phone for customers that call different
departments. Each of the three departments consists of five people. The company needs a simple
round-robin style queue for each department to ensure that the phone rings to a new person after
four rings each. What is the most efficient configuration to meet this requirement?

  • A. Configure three forward groups for each line in each department.
  • B. Configure three hunt pilots and set them up with round robin.
  • C. Configure three hunt groups and set them up with round robin.
  • D. Configure three Cisco Unified Contact Center Express agents and configure round robin.
Answer:

C

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Question 4

Some Cisco mobility users cannot resume calls on the desk phone after they hang up on a mobile
phone. The users have Cisco IP phones registered to the Cisco UCM. Which set of configuration steps
resolve the issue?

  • A. Add voice call disc-pi-off on the voice gateway. On Call Manager, set the Retain Media on Disconnect with PI for Active Call service parameter to True.
  • B. Add voice call disc-pi-on on the voice gateway. On Call Manager, set the Retain Media on Disconnect with PI for Active Call service parameter to False.
  • C. Add voice call disc-pi-off on the voice gateway. On Call Manager, set the Retain Media on Disconnect with PI for Active Call service parameter to False.
  • D. Add voice call disc-pi-on on the voice gateway. On Call Manager, set the Retain Media on Disconnect with PI for Active Call service parameter to True.
Answer:

A

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Question 5

An engineer is configuring Cisco UCME to support SIP endpoints. The engineer wants to limit the
system to 20 SIP phones and 50 directory numbers. Which code completes this configuration?
A.
telephony-service
mode cme
max-ephone 20
max-dn 50
B.
voice register global
mode cme
max-ephone 20
max-dn 50
C.
telephony-service
mode cme
max-pool 20
max-dn 50
D.
voice register global
mode cme
max-pool 20
max-dn 50

Answer:

B

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Question 6

Users of a Cisco UCME report that calls lose audio after they are forwarded to some users. Calling
point-to-point seems to function fine, but depending on the type of phone, some calls lose audio
when forwarded. Looking at the trace header that shows:
Allow: INVITE,BYE,CANCEL,ACK,INFO,PRACK,COMET,OPTIONS,SUBSCRIBE,NOTIFY,REFER,REGISTER
What is missing and is a reason that the SRTP stream stops working?

  • A. EARLY-OFFER
  • B. FORWARD
  • C. UPDATE
  • D. REDIRECT
Answer:

C

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Question 7

Users report that calls to some locations do not work. The phone is calling, the recipient picks up, but
it does not connect. These users are in the headquarters and registered to the company Cisco UCM
with default values for calling (G.711). The problem locations are smaller remote locations with low
bandwidth capacity, so the phones are configured with iLBC.
Which command should be used to troubleshoot the issue?

  • A. debug dsp all
  • B. show dsp active
  • C. show dspfarm dsp active
  • D. debug voice dspfarm
Answer:

C

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Question 8

Refer to the exhibit.

Refer to the exhibit. An engineer troubleshoots why a new SIP trunk does not come up on Cisco
UCM. Which action resolves this issue?

  • A. The device cube.abc.com must have the SIP stack turned up.
  • B. The destination port must be set to 5061.
  • C. The ACL that is configured on cube.abc.com must include the Cisco UCM IP address.
  • D. The DNS server that Cisco UCM is pointing to needs an A Record added for cube.abc.com.
Answer:

D

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Question 9

An engineer is reviewing the dial peer configuration on the Cisco Unified Border Element after users
reported that DTMF digits are not recognized when they make an outbound SIP call to a phone
system that supports only out-of-band DTMF.
Which configuration under outbound dial peer resolves the issue?

  • A. dtmf-relay sip-notify
  • B. dtmf-relay h245-signal
  • C. dtmf-relay rtp-nte
  • D. dtmf-relay h245-alphanumeric
Answer:

A

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Question 10

A Collaboration engineer wants to deploy Global Dial Plan Replication for advertising its global dial
plan data, including the global dial plan data that was configured locally and any data that was
learned from other clusters. The engineer is configuring the inter-cluster lookup service on the Cisco
UCM and activated the ILS service and configured the cluster IDs.
What is the next step in the configuration?

  • A. Activate ILS on the spoke cluster.
  • B. Configure remote clusters.
  • C. Enable TLS authentication between clusters.
  • D. Activate ILS on the hub cluster.
Answer:

B

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Question 11

A company is using third-party phones on the internal network at a location behind a Cisco Unified
Border Element. These phones seem to work with only two types of codecs, which are high-
complexity codecs.
Which configuration ensures that calls are completed with the correct and working media each time?

  • A. Configure a codec preference list on the Cisco Unified Border Element with the voice class codec command, set the codec preference list codecs, and add it to the dial peer.
  • B. Configure a codec priority list on the Cisco Unified Border Element with the voice class codec command, set the codec priority list codecs, and add it to the dial-peer voice.
  • C. Configure a codec preference list on the Cisco Unified Border Element with the VoIP class codec command, set the codec preference list codecs, and add it to the dial peer.
  • D. Configure a codec preference list on the Cisco Unified Border Element with the voice class codec command, set the codec priority list codecs, and add it to the VoIP peer.
Answer:

B

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Question 12

A company is using a H.323 gateway for PSTN calls from Cisco phones connected to a Cisco UCM
cluster. There are reports of problems getting audio on these incoming calls from the PSTN. The
phone rings, but nothing is heard and the call disconnects.
Which command troubleshoots this issue?

  • A. debug voice h323 inout
  • B. debug h245 pstn
  • C. debug h245 asn1
  • D. debug voice sip inout
Answer:

C

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Question 13

An administrator is attempting to set up redundancy to allow users to make calls even if all Cisco
UCM nodes go down or are unreachable by the IP phones.
Which feature must the administrator configure to accomplish this goal?

  • A. Survivable Remote Site Telephony
  • B. Cross-Origin Resource Sharing
  • C. Cisco UCM Redundancy Group
  • D. Hot Standby Router Protocol
Answer:

A

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Question 14

An engineer uses the standard local route group to configure call routing for the organization. The
engineer configured an additional local route group with a unique name.
Which action must be taken to ensure that each device in the system is provisioned to know its local
route group?

  • A. Configure route filters
  • B. Add the local route group to a route list
  • C. Associate the local route group with a device pool
  • D. Add the local route group to a translation pattern
Answer:

C

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Question 15

Refer to the exhibit.

Refer to the exhibit. An engineer is implementing the Cisco UCME and must set up a dial plan for the
7961 SIP phones to recognize digit strings dialed by users.
Which code snippet completes the configuration?

  • A. "button 1:1" under voice register pool
  • B. "number 1 dialplan 1" under the voice register pool
  • C. "number 1 dp 1" under the voice register pool
  • D. "dialplan 1" under the voice register pool
Answer:

A

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