Download New Latest (May) Cisco 642-427 Actual Tests 101-110

Ensurepass

 

QUESTION 101  (Topic 2)

 

Three calls can successfully be made across a WAN link. When a fourth call is made, the quality of all four calls degrades. Which QoS mechanism can help avoid this problem?

 

A.

CAC

B.

FRF.12

C.

LFI

D.

LLQ

E.

priority queuing

 

Answer: A

 

 

QUESTION 102  (Topic 2)

 

Refer to the exhibit. You have received a trouble ticket stating that calls to international numbers are failing. To place an international call, users dial the access code “9,” followed by “011,” the country code, and the destination number. After entering the debug isdn q931 command on the MGCP gateway, you have the user attempt the call again.

 

clip_image001

 

Based on the debug output, what is the most likely cause of this problem?

 

A.

Cisco Unified CallManager is not stripping the access code before sending the call to the gateway.

B.

The gateway dial peer needs to prefix “011” to the called number so the PSTN knows this is an international call.

C.

The us
er’s CSS does not permit international calls.

D.

The TON is incorrect.

E.

The circuit is not configured correctly or has a physical layer issue.

 

Answer: C

Explanation: Cause Code Origination Point

 

 

 

Look @ messageChanel ID i = 0x828381

The first byte (most significant) after0xindicates the point in the circuit path where the disconnect cause code appears.

 

clip_image002

 

The last two hexadecimal digits (BEin the example) are optional. You do not commonly use these digits for diagnostic purposes. However, you can sometimes use this byte to furnish additional information for the Disconnect Cause Code. Thedebug isdn q931output can sometimes contain these digits.

http://www.cisco.com/en/US/tech/tk801/tk379/technologies_tech_note09186a008012e95f.s html

 

 

QUESTION 103  (Topic 2)

 

Which log file contains call-processing information from services such as Cisco Unified CallManager and Cisco Unified CallManager CTI Manager?

 

A.

CTI trace

B.

SDI trace

C.

CDROnDemand

D.

SDL trace

 

Answer: B

 

 

QUESTION 104  (Topic 2)

 

LSC validation is failing on a new SCCP IP phone you have just added to the Cisco Unified CallManager 5.0 cluster. No other IP phones are experiencing any problems with LSC validation. What can you do to help pinpoint the problem?

 

A.

View the SDI trace output.

B.

Check for security alarms.

C.

Use the security configuration menu on the IP phone to verify that an LSC has been downloaded to the IP phone.

D.

Verify that the authentication string is correct in the Cisco Unified CallManager device configuration screen.

 

Answer: C

Explanation:Troubleshooting If the Locally Significant Certificate Validation Fails On the phone, the locally significant certificate validation may fail if the certificate is not the version that CAPF issued, the certificate has expired, the CAPF certificate does not exist on all servers in the cluster, the CAPF certificate does not exist in the CAPF directory, the phone is not registered to CiscoCallManager, and so on. If the locally significant certificate validation fails, review the SDL trace files and the CAPF trace files for errors. You can verify that the locally significant certificate installed on the phone by choosing Settings > Model Informationand viewing the LSC setting. The LSC setting displays InstalledorNot Installed, depending on the circumstances. Link:http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/trouble/6_0_1/tbsystem.html# wpmkr1159616

 

 

QUESTION 105  (Topic 2)

 

Users are complaining that they hear echo when they place calls to the PSTN through the HQ_PSTN gateway. The voice port configuration for the gateway is as follows:

 

voice-port 1/0:23

 

input gain -1

 

output attenuation 1

 

echo-cancel erl worst-case 3

 

Why are users hearing echo?

 

Select the best response.

 

A.

The echo canceller is functioning properly and some echo is to be expected on every

 

 

call.

B.

The actual ERL is 2dB; however, the echo canceller still does not acknowledge the input signal as echo because it is lower than the echo-cancel erl worst-case 3 command.

C.

The echo canceller should be configured so that SIN and SOUT have a 2 dB difference in order to function properly.

D.

InSignalLevel needs to be adjusted so that it is within the range from -20 dB to -25 dB

 

Answer: B

 

 

QUESTION 106

HOTSPOT  (Topic 2)

 

clip_image003

Answer:

 

 

clip_image004

 

A.

 

B.

 

C.

 

D.

 

 

Answer:

 

 

QUESTION 107  (Topic 2)

 

Which Cisco Unity troubleshooting tool would be used to diagnose problems with skinny and MWI messages?

 

A.

Cisco Unity Performance Information and Diagnostics

B.

Unity Diagnostic Tool

C.

Integration Monitor

D.

SysCheck

 

Answer: B

 

 

QUESTION 108  (Topic 2)

 

What are the two most common causes of echo? (Choose two.)

 

A.

impedance mismatch at the two-wire to four-wire hybrid

B.

misconfigured tail circuits

C.

excessive packet loss

D.

signal reflection

E.

incorrect IP phone software loads

 

Answer: AD

 

 

QUESTION 109  (Topic 2)

 

What happens if CDP is not enabled on a switch port to which an IP phone is connected?

 

A.

The phone is unable to acquire an IP address.

B.

The phone cannot get its VLAN ID assignments.

C.

The phone cannot learn the address of the TFTP server.

D.

The switch will put the port into the errDisable state until CDP is enabled.

 

Answer: B

 

 

QUESTION 110  (Topic 2)

 

You have received a trouble ticket from John Doe at extension 2001, which states that he cannot call a new employee who has been assigned extension 2005. When John Doe attempts to call 2005 he hears a message that his call cannot be completed as dialed.

What is one possible cause of this issue?

 

A.

The new employee’s phone is not registered with Cisco Unified CallManager due to a physical cable or IP connectivity issue.

B.

John Doe’s CSS does not contain the partition assigned to extension 2005.

C.

Extension 2005 was not assigned a partition.

D.

A Cisco Unity voice-mail box has not yet been created for the new employee.

 

Answer: B

 

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