642-456 braindumps

Exam Name: Implementing Cisco Unified Communications Manager Part 2
Exam Type: Cisco
Exam Code: 642-456 Total Question 137 Which three statements are true in order for inbound PSTN calls to work in an H.323 gateway
configured with Cisco Unified Communications Manager? (Choose three.)

A. The H.323 gateway should be registered with Cisco Unified Communications Manager.
B. The command h323-gateway voip tech-prefix should be configured on the H.323 interface.
C. The command h323-gateway voip bind srcaddr should be configured on the H.323 interface.
D. A VoIP dial peer pointing to Cisco Unified Communications Manager should be configured.
E. The command h323-gateway voip id should be configured under the H.323 interface.
F. A pots dial peer with direct-inward-dial and incoming-called number should be configured.

Answer: C, D, F
Question: 5
You have configured SRST at a remote site on an MGCP gateway. During testing, you find that
IP phones are not registering with the SRST router when the IP WAN fails.

Which three potential problems need to be investigated? (Choose three.)

A. No dial peers have been added to the SRST router.
B. No SRST reference address is included in the device pool.
C. The proper service command has not been added to the SRST router.
D. The max-ephones command is missing in the SRST router.
E. The max-dn command is missing in the SRST router.
F. The ccm-manager fallback-mgcp command is missing in the SRST router.

Answer: B, D, E

Which one of the following descriptions is correct about locations based CAC?(Choose one.)

A. It is a purely logical assignment and does not reflect the actual topology or the actual
bandwidth available.
B. Each device may have more than one location assigned.
C. Cisco Unified Communications Manager uses an arbitrary bandwidth value for each location.
D. Locations based CAC is used to determine the codec used between sites.

Answer: A
Each Cisco Unified Communications Manager cluster can support up to 30,000 users. A remote
site disconnected to the centralized Cisco Unified Communications Manager cluster. The remote
site H.323 gateway is configured to support SRST. Which three options are correct about
SRST?(Choose three.)

A. The remote site IP phones initiate registration with the SRST gateway.
B. The gateway sends Keepalives to Cisco Unified Communications Manager to determine when
connectivity is restored.
C. The IP phones send Keepalives to Cisco Unified Communications Manager to determine when
connectivity is restored.
D. The IP phones re-register with Cisco Unified Communications Manager when they see
responses to the Keepalives.

Answer: A, C, D
A Media Termination Point (MTP) software device allows Cisco CallManager to relay calls that
are routed through SIP or H.323 endpoints or gateways. Which description below is correct about
a Media Termination Point?(Choose one.)

A. A Media Termination Point corrects a mismatch in DTMF transport types when using Delayed
Offer for inbound SIP calls.
B. A Media Termination Point is an entity that accepts two full-duplex G.711 streams. It bridges
the media streams together and allows them to be set up and torn down independently.
C. A hardware Media Termination Point can be used to transcode a-law to mu-law and vice
versa, but both connections must utilize the same packetization periods.
D. When using H.323 Fast Start, for inbound and outbound Fast Start, a Media Termination Point
is required.

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Answer: B

Automated alternate routing (AAR) provides a mechanism to reroute calls through the PSTN or
other network by using an alternate number when Cisco Unified Communications Manager blocks
a call due to insufficient location bandwidth. AAR supports which two call scenarios?(Choose
two.)

A. Calls from remote sites where SRST is activated
B. Calls with CTI route points as the origin or destination of calls
C. Calls originating from an IP phone within one location which terminates at an IP phone within
another location
D. Calls incoming through a gateway device within one location which terminates at an IP phone
within another location

Answer: C, D
Where should the security configuration take place to enable security on an IP phone?

A. Only Phone Device Configuration
B. Both Phone Security Profile and Phone Device Configuration
C. Only Phone Security Profile
D. Both User Profile Configuration and Phone Device Configuration

Answer: B

What is the function of Cisco Unified CallManager Regions?

A. To assign directory numbers to devices as they connect to the IP telephony network
B. To implement call admission control in a centralized call processing deployment
C. To provide alternate call routing when the primary call path is unavailable
D. To specify the codec used for audio and video calls

Answer: D
The certways Corporation is experiencing poor, choppy audio quality on voice calls placed across
their WAN link to and from Madison. What can be done to the Location parameter for Madison to
help alleviate this problem?

A. Nothing, the audio bandwidth Location parameter for Madison is not related to the problem.
B. Increase the audio bandwidth setting in the Location configuration window for Madison.
C. Decrease the audio bandwidth setting in the Location configuration window for Madison.
D. Remove the audio bandwidth parameter in the Location configuration window for Madison.

Answer: C

Which Call Admission Control method can be used for intercluster calls?

A. Resource Reservation Protocol
B. Gatekeeper resource availability indication
C. Cisco CallManager locations
D. Gatekeeper zone bandwidth

Answer: D

POTS Dial Peer refers to the dial peer connected via a traditional telephony network (POTS).
Which commands can be used to troubleshoot a POTS dial-peer that fails to work? (Choose
three)

A. show ccm-manager
B. show gatekeeper endpoints
C. show dial-peer voice summary
D. show voice port 1/0

Answer: A, C, D
Trivial File Transfer Protocol (TFTP) is a file transfer protocol, with the functionality of a very basic
form of File Transfer Protocol (FTP). TFTP images can be encrypted by which of the following
services?

A. Cisco TFTP
B. Cisco Messaging Interface
C. Cisco CTI Manager TFTP images
D. Cisco CTL Provider

Answer: A
You have a H.323 network and want to limit the bandwidth at HQ to 128 kbp and bandwidth from
HQ to remote sites to 256kbps. (Choose two)

A. Bandwidth interzone zone HQ 256
B. Bandwidth session 128
C. Bandwidth session zone HQ 128
D. Bandwidth default 128
E. Bandwidth total 256

Answer: A, C

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