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QUESTION 51
Use the diagram to assist in answering this question.
You have received a trouble ticket for a recently installed MGCP gateway. In testing it appears that the CallManager cluster cannot communicate with the gateway. The gateway address is 10.1.44.12/24 and the CallManager that is going to control the gateway has an address of 10.1.44.4/24. Use the following configuration snip to resolve the problem.
! mgcp mgcp call-agent 10.1.44.4 2427 service-type mgcp version 1.0 mgcp dtmf-relay voip codec all mode out-of-band mgcp rtp unreachable timeout 1000 action notify mgcp modem passthroughvoice mode cisco mgcp sdp simple mgcp package-capability rtp-package mgcp package-capability sst-package no mgcp timer receive-rtcp no mgcp explicit hookstate
! ccm-manager config server 10.1.44.7
ccm-manager config !
What command is missing from the configuration that will allow the CallManager to control this gateway?

A. ccm-manager mgcp
B. mgcp bind control source-interface FastEthernet 0/0
C. ccm-manager redundant-host
D. ccm-manager fallback-mgcp
E. ccm-manager switchback

Correct Answer: A Section: (none) Explanation
Explanation/Reference:
QUESTION 52
You have received a trouble ticket that says users are experiencing echo when going out the H.323 gateway. You have tested the gateway and have modified the configuration so that the ERL level is now 4 dB. You also increased the echo-cancel coverage value to 32 ms. How will this impact voice quality after this change?
A. The increase in echo-cancel coverage will have no effect on voice quality.
B. This will lead to the end of sentences being chopped by the echo canceller.
C. This will lead to consonants being chopped by the echo canceller.
D. This change will take the echo canceller 2-3 seconds longer to converge at the beginning of the call.

Correct Answer: D Section: (none) Explanation
Explanation/Reference:
QUESTION 53
What are the two most common causes of echo? (Choose two.)
A. acoustic feedback from speaker phones
B. impedance mismatch at the 2-wire to 4-wire hybrid
C. misconfigured tail circuits
D. signal reflection E. IP phone software loads

Correct Answer: BD Section: (none) Explanation
Explanation/Reference:
QUESTION 54
You have received a trouble ticket for a recently installed MGCP gateway.
It appears that under testing the gateway, it is not switching to the secondary call agent when the primary call agent is unreachable. Use the following configuration output to resolve the problem.
! mgcp mgcp call-agent 10.1.44.4 2427 service-type mgcp version 1.0 mgcp dtmf-relay voip codec all mode out-of-band mgcp rtp unreachable timeout 1000 action notify mgcp modem passthrough voice mode cisco mgcp sdp simple mgcp package-capability rtp-package mgcp package-capability sst-packateno mgcp timer receive-rtcp no mgcp explicit hookstate ! ccm-manager mgcp ccm-manger config server 10.1.44.7 ccm-manager config !
What command needs to be added to this configuration to allow the MGCP gateway to use a different call agent if the primary fails?
A. ccm-manager fallback-mgcp
B. ccm-manager switchback
C. ccm-manager switchover-to-backup
D. ccm-manager redundant-host

Correct Answer: D Section: (none) Explanation
Explanation/Reference:

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