Cisco 642-427 Online Practice Questions and Exam Preparation

Cisco 642-427 Online Questions & Answers

• Question 1:

  An IP phone that is connected through a Cisco Catalyst 3750 Series Switch is failing to register with the subscriber as a backup server. When the user presses the settings button on the phone, only the Cisco Unified Communications Manager publisher shows as registered. What is the most likely cause for this issue?

  A. The phone does not have the correct Cisco Unified Communications Manager group in the device configuration page.
  B. The Cisco Unified Communications Manager group that is applied through the device pool is misconfigured.
  C. The ip-helper address command for the subscriber is not configured on the switch port.
  D. The subscriber does not have the correct device pool configured.
  E. The enterprise phone configuration does not have the call control redundancy enabled.
  B. The Cisco Unified Communications Manager group that is applied through the device pool is misconfigured.

• Question 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
  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.

• Question 3:

  Refer to the exhibit.

  

  All calls to 4565000 must be routed to the Cisco Unified Communications Manager server 10.10.10.100. All other 7-digit numbers that start with 456 must be routed to the third-party PBX.

  Which change is needed to route calls to 4565000 to the Cisco Unified CM server 10.10.10.100 and route all other 7-digit numbers that start with 456 to the third- party PBX?

  A. Remove prefix 456 from dial peer 1.
  B. Change dial peer 1 to destination-pattern 456....
  C. Change dial peer voice 1 pots to dial peer voice 100 pots.
  D. Change dial peer 2 to session target 10.10.10.100.
  B. Change dial peer 1 to destination-pattern 456....

• Question 4:

  Refer to the exhibit. You have received a trouble ticket that two engineers at the HQ site tried to conference at a user location at the Branch site and the ad-hoc conference failed.

  

  Further investigation reveals that the remote user can occasionally be conferenced in. Phones are configured to use G.711 for intra-site calls and G.729 for inter- site calls. All phones at the remote site are configured to use MRGL_Branch, which contains only the media resource group named BRANCH.

  What should be done to correct this issue?

  A. The software conference bridge CFB_2 should be removed from the Branch media resource group.
  B. The hardware conference bridge CFB0012005FEEF1 should be listed first in the Branch media resource group so it is utilized if it is available.
  C. Additional hardware conference resources should be added.
  D. The number of sessions allowed per conference should be increased.
  A. The software conference bridge CFB_2 should be removed from the Branch media resource group.

• Question 5:

  Which debug command can be used to troubleshoot a PRI issue on a voice gateway?

  A. debug Q931
  B. debug vpm sig
  C. debug voip ccapi inout
  D. debug h225
  A. debug Q931

• Question 6:

  Which tool allows the administrator to analyze call routing in Cisco Unified Communications Manager without physically placing a call?

  A. Cisco Unified Communications Manager Dialed Number Analyzer.
  B. Cisco IOS Gateway debug commands.
  C. Cisco Unified Communications Manager RTMT trace output.
  D. base configuration information for this user that specifies Class of Restriction, Partition and Calling Search Space information
  E. Cisco Unified Communications Manager Serviceability tools
  F. Cisco Unified Communications Manager OS Administration.
  A. Cisco Unified Communications Manager Dialed Number Analyzer.

• Question 7:

  Refer to the exhibit. A site is using four-digit extensions for internal calling. The voice-mail pilot number is 8000. Calls to extension 2001 hear the Cisco Unity opening greeting instead of the subscriber's greeting when forwarded to Cisco Unity. What is the probable cause?

  

  A. The mailbox is configured with the E.164 number instead of the extension.
  B. A call routing rule has been added that is preempting the Attempt Forward rule.
  C. Extension 2001 has not been defined in Cisco Unity.
  D. A greeting has not been recorded for mailbox 2001.
  E. The Voice Mail Box Mask setting in Cisco Unified CallManager is set to 8000 instead of XXXX
  E. The Voice Mail Box Mask setting in Cisco Unified CallManager is set to 8000 instead of XXXX

• Question 8:

  Which three Cisco IOS commands are required to configure a voice gateway as a DHCP server to support a data subnet with the IP address of 101.30.0/24 default gateway of 10.1.30.1/24? (Choose three)

  A. ip dhcp pool
  B. subnet 10.1.30.1 255.255.255.0
  C. ip dhcp pool data
  D. network 10.1.30.1/24
  E. network 10.1.30.0 255.255.255.0
  F. default-gw 10.1.30.1.24
  G. default-router 10.1.30.1
  C. ip dhcp pool data
  E. network 10.1.30.0 255.255.255.0
  G. default-router 10.1.30.1

• Question 9:

  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
  A. impedance mismatch at the two-wire to four-wire hybrid
  D. signal reflection

• Question 10:

  As a network administrator, you should be familiar with the bandwidth command. Which parameter of the bandwidth command is used in gatekeeper configuration mode to specify the maximum amount of bandwidth that can be allocated in a zone?

  A. interzone
  B. total
  C. session
  D. remote
  B. total