Actualtests 642-425
642-425 : Cisco Storage Networking Solutions Support Specialist Last Updated Thursday, August 07, 2008 with 270 Questions
IP Communications IP Telephony Troubleshooting
Exam Number: 642-425 Exam
Associated Certifications: IP Communications IP Telephony Troubleshooting
Duration: 54 Q&As
Available Language(s): English
Exam Details
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.
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642-425 Exam: Actualtests’s IP Communications IP Telephony Troubleshooting PDF
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QUESTION 1:
AN outsourcing IT firm has come in to review operations for all SQL server
machines in an organization. They request, and are allowed to change all usernames
and passwords for security purposes. After they leave, replication fails.
What is the most likely problem?
A. CCMAcct username mismatch
B. CCMSvc password mismatch
C. SQLSvc password mismatch
D. SQLRpl username mismatch
Answer: C
Explanation: The SQLSvc account is the core account used for server-to-server
interaction within a Cisco CallManager system. This account must be the same on every
machine in the cluster for database replication to work properly. If the SQLsvc password
has been changed on the publisher from the installed default, replication of the publisher
database will fail when a new subscriber is added.If replication has failed, change the
new subscriber’s SQLsvc service password to match the SQLsvc password on the
publisher, and replication should succeed.
QUESTION 2:
Which CTI device allows queuing of calls to an unlimited depth?
A. hunt group
B. route point
C. peer
D. port
Answer: B
QUESTION 3:
You have recently installed a new Catalyst 3524-PWR switch in an IDF to increase
the number of IP phones for a department. The IP phone for an office receives
power but cannot communicate with the CallManager. The department uses VLAN
16 for data and VLAN 160 for voice. From the given show running-configuration
command there are multiple problems. How can the communication problem with
the CallManager be resolved?
Dept16SW2#show running.-configuration
!
!
output omitted
642-425
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!
interface FastEthernet 0/6
switchport trunk encapsulation dot1q
switchport trunk native vlan 16
switchport mode trunk
switchport voice vlan 169
spanning-tree uplinkfast
switchport priority extend none
!
end
A. Change the voice VLAN to 160.
B. Change the switchport trunk encapsulation type to ISL.
C. Configure the port as an uplink to another switch configured for uplinkfast.
D. Change the incorrect switchport priority extend none command to switchport priority
extend trust to extend the trust boundary to the IP phone.
Answer: A
QUESTION 4:
You have a centralized IP Telephony system with branch offices in eight major
cities. The manager of your company help desk recently published local access
numbers for external customers to reduce the cost associated with your company’s
toll-free 800 service. When customers call the new local numbers they hear a
reorder tone instead of your centralized IP-IVR.
What is the best solution to this issue?
A. Deploy transcoders at the central location.
B. Deploy transcoders at each remote location.
C. Modify Region configuration to allow G.711 across the WAN.
D. Deploy IP-IVRs to each remote location.
Answer: A
QUESTION 5:
The operation of an existing network is severely degraded,
Assign the appropriate severity level as defined by the TAC Case Severity
Definition.
A. S2 upgraded to S1
B. S4 upgraded to S1
C. S1 downgraded to S2
D. S3 downgraded to S4
E. S3 upgraded to S2
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Answer: E
Cisco IP Solution Center Documentation Guide, 3.2
TAC Case Priority Definitions
To ensure that all cases are reported in a standard format, Cisco has established case
priority definitions.
Priority 1 (P1)-Your network is “down” or there is a critical impact to your business
operations. You and Cisco will commit all necessary resources around the clock to
resolve the situation.
Priority 2 (P2)-Operation of an existing network is severely degraded, or significant
aspects of your business operation are negatively affected by inadequate performance of
Cisco products. You and Cisco will commit full-time resources during normal business
hours to resolve the situation.
Priority 3 (P3)-Operational performance of your network is impaired, but most business
operations remain functional. You and Cisco will commit resources during normal
business hours to restore service to satisfactory levels.
Priority 4 (P4)-You require information or assistance
http://www.cisco.com/en/US/partner/products/sw/netmgtsw/ps4748/products_documentation_roadmap09186a0
0
QUESTION 6:
DRAG DROP
Drag the Cisco recommended troubleshooting model step to its appropriate
location.
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Answer:
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QUESTION 7:
Echo is always present to some extent in all voice networks.
For echo to be a problem, which three conditions must exist? (Choose three)
A. An analog 2-wire to 4-wire hybrid operating below a 600 ohm impedance.
B. Analog leakage between analog Tx and Rx paths.
C. Sufficient delay in echo return for echo to be perceived as annoying.
D. Sufficient echo amplitude to be perceived as annoying.
E. Sufficient power from the talker’s side to cause listener echo.
Answer: B, C, D
Troubleshooting Echo Problems between IP Phones and IOS Gateways
Document ID: 19640
Echo is perceived as annoying when all of the following conditions are true:
* Signal leakage between analog Tx and Rx paths
* Sufficient delay in echo return
* Sufficient echo amplitude
http://www.cisco.com/en/US/partner/tech/ck652/ck698/technologies_tech_note_09186a0080149a1f.shtml
QUESTION 8:
The outbound access code from the CallManager is not being stripped. The
following configurations are set:
Route Pattern / Hunt Pilot Configuration
Discard Digits = PreDot
Route / Hunt List Detail
Discard Digits to NoDigits
What is the most likely solution?
A. Set Called Party Transformations under Route / Hunt List Detail to PreDot.
B. Set Calling Party Transformations under Route / Hunt List Detail to
C. Set Called Party Transformations under Route Pattern to NoDigits Change.
D. Set Calling Party Transformation under Route Pattern to
Answer: A
QUESTION 9:
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IP Phone A can make calls to some but not all phones. Phone A cannot call Phone B.
The following is the extended ping output from the router interface on the
CallManager subnet to the Phone B subnet.
ping 172.16.1.45
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.45, timeout is 2 seconds:.!.!
Success rate is 40 percent (2/5)
What does this output indicate?
A. CallManager has a good IP path to Phone B.
B. The IP path from CallManager to Phone B has a 20% packet loss problem.
C. The IP phone is turned off, but the switch port it connects to is accessible via IP.
D. Multiple equal cost paths exist from CallManager to Phone B, and one is currently
unusable.
Answer: D
From the PING result , we could deduce that there are multiple paths to phone B and one
of them are not down. This is also the reason why Phone A can’t ring phone B.
If the PING result is 100%, then the answer is A.
QUESTION 10:
What task should be completed before enabling CCM trace files in a CallManager
cluster?
A. Configure NTP on all CallManagers.
B. Configure XML Formatted Output for Trace Analysis.
C. Install the Trace Collection Tool Plugin.
D. Configure a share drive on the publisher to store the trace files.
Answer: A
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