Free Pass4sure Cisco IP Communications Exam 642-425 v2.93 Download

The Cisco IP Telephony Troubleshooting exam will certify that the successful candidate has important knowledge and skills necessary to troubleshoot Enterprise CallManager, Unity, and IP network deployments. The IP Telephony Troubleshooting exam is one of two exams in a curriculum that addresses both design/planning practices and hands-on experience in configuring, deploying, and troubleshooting AVVID solutions. IP Communications IP Telephony Troubleshooting : 642-425 Exam

Exam Number/Code: 642-425
Exam Name: IP Communications IP Telephony Troubleshooting
VUE Code: 642-425
Questions Type: Single choice, Multiple choice, Simulate,
Real Exam Question Numbers: 50-60 questions
Exam Language(s): English

642-425 IPTT
IP Telephony Troubleshooting Exam

Last day to test 10/02/07
Exam Number: 642-425
Associated Certifications: CCVP, and IP Telephony Operations Specialist
Duration: 90 minutes (50-60 questions)
Available Languages: English
Click Here to Register: Pearson VUE
Exam Policies: Read current policies and requirements
Exam Tutorial: Review type of exam questions

Exam Description Introduction Exam Topics Recommended Training Additional Resources
Exam Description Introduction
The Cisco IP Telephony Troubleshooting exam will certify that the successful candidate has important knowledge and skills necessary to troubleshoot Enterprise CallManager, Unity, and IP network deployments. The IP Telephony Troubleshooting exam is one of two exams in a curriculum that addresses both design/planning practices and hands-on experience in configuring, deploying, and troubleshooting AVVID solutions.

Exam Topics
The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam.

Describe effective troubleshooting methods to resolve issues in complex IP Telephony networks
Identify general converged network problems and issues
Perform a baseline analysis and document existing infrastructure using Cisco recommended methodologies
Create a troubleshooting strategy that follows Cisco recommended methodologies
Use Cisco TAC as a troubleshooting and escalation tool

Troubleshoot common CallManager configuration, integration and operations problems
Troubleshoot common call setup problems with both voice and video calls
Troubleshoot complex CallManager problems using system trace files
Troubleshoot and resolve Cisco CallManager dial-plan issues including CSS, Partitions, and translation patterns
Troubleshoot and resolve problems with media resources including MOH and conferencing
Identify CTI components and troubleshoot problems related to CTI

Troubleshoot Cisco AVVID and server components using the appropriate utilities and management tools
Demonstrate the use of the Cisco CallManager Serviceability tools to troubleshoot IPT problems

Troubleshoot common router, switch and gateway configuration, integration and operation issues and problems
Determine the effect of Layer 2 configuration errors on an IPT network operation
Determine the effect of Layer 3 configuration errors on an IPT network operation
Troubleshoot and resolve problems with Gateway operation

Use appropriate troubleshooting methods to determine and solve QoS issues in complex IP Telephony networks
Determine the QoS policies in effect in an established network
Describe the various QoS methods available and their effect on network traffic flows
Identify common problems associated with voice echo

Troubleshoot common Unity configuration, integration and operation issues and problems
Troubleshoot and resolve message delivery problems
Describe disaster recovery tools
Troubleshoot and resolve MWI problems
Troubleshoot and resolve Voice Mail port problems

“IP Communications IP Telephony Troubleshooting”, also known as 642-425 exam, is a Cisco certification.
Preparing for the 642-425 exam Searching 642-425 Test Questions, 642-425 Exam, 642-425 Dumps

With the complete collection of questions and answers Q&as with Expert Explanations, Pass4sure has assembled to take you through 54 Q&As to your 642-425 Exam preparation. In the 642-425 exam resources, you will cover every field and category in IP Communications helping to ready you for your successful Cisco Certification.

QUESTION 16:
Which unity troubleshooting tool would be used to diagnose problems with skinny
and MWI?
A. trace tool
B. configuration tool
C. diagnostic tool
D. maestro tool
Answer: C
Cisco Unity Troubleshooting Guide (With Lotus Domino), Release 4.0(1)
CiscoUnity Diagnostic Tool
The CiscoUnity Diagnostic Tool allows creating and viewing of diagnostic log files to
troubleshoot problems. It replaces the diagnostic log functionality in Maestro Tools, and
allows the system administrator or TAC staff to selectively run diagnostic traces at two
levels:
1. Macro Traces-These are collections of component traces that help diagnose problems
such as message waiting indicator and system problems.
2. Micro Traces-These are the component traces. Each component has up to 32 trace
levels that can be individually selected.
The CiscoUnity Diagnostic Tool also allows the system administrator or TAC staff to
perform the following tasks:
1. Create new log files on demand. This makes troubleshooting problems easier. When a
problem can be reproduced reliably, the system administrator can close all existing log
files and create new log files prior to reproducing the problem. This eliminates many
unnecessary and unrelated items from the logs.
2. Configure log settings. The system administrator can adjust the maximum disk space
allowed for all diagnostic log files. (The default setting is 400 MB.) The Logging
Properties screen also allows the system administrator to disable all diagnostic output by
clearing the Diagnostic Output check box.
3. Gather standard logs. This option provides the ability to quickly gather all or selected
Microsoft Windows and CiscoUnity logs.
4. Disable all traces. This is a quick way to return diagnostic logs to their default settings
after troubleshooting efforts are complete.
642-425
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5. View the Event log. The Event log files for either the local computer or another
computer can be viewed and exported.
6. Change the display language for Windows Event log messages that are generated by
Cisco Unity. This is a temporary change and is only in effect while the Cisco Unity
Diagnostic Tool is running.
QUESTION 17:
Following a partial configuration of an access layer switch:
mls qos map cos-dscp 0 8 12 16 28 32 40 46
mls qos
!
Voice bearer traffic will be set to which per hop behavior?
A. ef
B. cs4
C. af32
D. af12
E. be
Answer: B
mls qos map
To define the multilayer switching (MLS) class of service (CoS)-to-differentiated
services code point (DSCP) map or DSCP-to-CoS map, use the
mls qos map command in global configuration mode. To return to the default map, use
the no form of this command.
mls qos map {cos-dscp dscp1…dscp8 | dscp-cos dscp-list to cos}
no mls qos map {cos-dscp | dscp-cos}
Syntax Description Introduction
cos-dscp
dscp1…dscp8
Defines the CoS-to-DSCP map. For
dscp1…dscp8, enter eight DSCP values
that correspond to CoS values 0 to 7.
Separate consecutive DSCP values from
each other with a space. The supported
DSCP values are 0, 8, 10, 16, 18, 24, 26,
32, 34, 40, 46, 48, and 56.
dscp-cos dscp-list to
cos
Defines the DSCP-to-CoS map. For
dscp-list, enter up to 13 DSCP values
separated by spaces. Then enter the to
keyword. The supported DSCP values
are 0, 8, 10, 16, 18, 24, 26, 32, 34, 40,
46, 48, and 56. For cos, enter the CoS
value to which the DSCP value or
values correspond. The CoS range is 0
to 7.
642-425
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Defaults
Table 1 shows the default CoS-to-DSCP map.
Table1 Default CoS-to-DSCP Map
CoS 0 1 2 3 4 5 6 7
Value
DSCP 0 8 16 26 32 46 48 56
Value
Table 2 shows the default DSCP-to-CoS map.
Table2 Default DSCP-to-CoS Map
DSCP 0 8, 10 16, 18 24, 26 32, 34 40, 46 48 56
Values
CoS 0 1 2 3 4 5 6 7
Value

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hlsw_r/lan_a1h.htm#wp1111205

QUESTION 18:
You have recently installed IP Phones on a centralized model. At a remote branch
using a H.323 gateway, users are complaining they cannot call some internal
numbers. After dialing the last digit, they get a reorder tone.
What is the most likely cause?
A. Partition/CSS configuration issue
B. Gateway dial-peer configuration issue
C. Codec mismatch
D. Call Admission Control
Answer: D
In centralized processing environment, the locations feature in Cisco CallManager lets
you specify the maximum amount of audio bandwidth (for audio calls) that is available
for calls to and from each location.
This limits the number of active calls and limits oversubscription of the bandwidth on the
IP WAN links. If any additional calls try to exceed the bandwidth limit, the system
rejects them, the calling party receives reorder tone, and a text message displays on the
phone.
QUESTION 19:
The default configuration of dial peer 0 will fail to set which three of the following?
(Choose three)
A. DID
B. Toolkit Command Language (TCL) applications
C. Non-default voice-network capabilities: dtmf-relay, vad, and other commands
642-425
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D. ANI with answer address
E. DNIS with incoming called number
Answer: A, B, C
Explanation:
If no incoming dial-peer is matched by the router or gateway, the inbound call leg is
automatically routed to a default dial peer (POTS or Voice-Network). This default dial
peer is referred to as dial-peer 0. Dial-peer 0 has a default configuration that cannot be
changed. The default dial-peer 0 fails to negotiate non-default capabilities, services, and
applications such as: (a) Non-default Voice-Network capabilities: dtmf-relay, no vad, so
forth, and so on. (b) Direct Inward Dial (DID) (c) TCL Applications
QUESTION 20:
An 802.1Q trunk is configured with mismatched native VLANs.
What is the most likely symptom?
A. Communication over the link occurs in one direction only.
B. Spanning Tree Protocol is disabled for all VLANs in the trunk.
C. The switch port is shut down and displays a port status of errDisable.
D. Layer 2 CoS markings are not mapping correctly to layer 3 QoS markings.
Answer: D
As 802.1Q header