Pass4sure Cisco IP Communications Exam 642-425 v2.93
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,
Question Numbers of Real-exam: 50-60 questions
Exam : Cisco 642425
Title :
IP Telephony Troubleshootin
Update : Demo
1.AutoAttendant is not registered. Given the Event Viewer output above, what is the most likely
problem?
A.The route point has not been defined.
B.The JTAPI server is down
C.The JTAPI provider and client passwords do not match. D.The route point DN is improperly configured.
Correct:C
2.You have received a trouble ticket that an executive cannot retrieve his account information from his bank. When the call is answered, the executive is prompted to enter his account code. The bank does not seem to recognize the DTMF tones and disconnects the call. What is a possible solution to this problem?
A.Configure progress_ind setup enable 3 under the gateway VoIP dialpeer. B.Configure progress_ind alert enable 8 under the gateway POTS dialpeer. C.Configure voice rtp sendrcv in the gateway.
D.Set CallManager Service Parameter ToSendH225UserInfoMsg to True.
Correct:C
3.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, 100byte 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.
Correct:A
4.A company has migrated to a Cisco CallManager IP telephony system and now is replacing the existing voice mail system with a Cisco Unity voice mail system. A small group of users has been established to test the new voice mail system. During testing the users are unable to leave voice mail messages on the new Unity system. It appears that the ports hang when users try to send voice mails. How would you determine the cause of the problem? (Choose two.)
A.Verify that the Cisco CallManager has been configured with the correct number of voice mail ports; the number of voice mail ports must match the Cisco Unity configuration.
B.Verify in the Cisco CallManager that the hunt group is hunting to Cisco Unity ports that can accept calls. C.Verify the Cisco CallManager has been configured with the correct MWI ports; the number of MWI ports must match the Cisco Unity configuration.
D.Verify the call transfer call handlers are configured correctly. E.Verify there are no TSP warnings in the Event Viewer. Correct:A B
5.Three calls can be successfully made across a WAN link. When a fourth call is made, the quality
of all four calls degrades. What QoS mechanism can help avoid this problem?
A.LLQ B.CAC
C.priority queuing D.classification E.LFI
Correct:B
6.Following is a partial configuration of an access layer switch: mls qos map cosdscp 0 8 12 16 28
32 40 46 mls qos ! Voice bearer traffic will be set to which dscp value?
A.46
B.32
C.28
D.12
E.0
Correct:B
7.Which tool lists the following options in a query: All Patterns Unassigned DN Call Park Conference Directory Number Translation Pattern Call Pickup Group Route Pattern Message Waiting Voice Mail Attendant Console
A.SQL Enterprise Manager > CCM 03xx > Device Pool > Return All Rows
B.Route Plan > Route Plan Report
C.Digit Number Analyzer
D.Route Plan > External Route Plan Wizard
Correct:B
8.Hotspot
Correct:
9.You have received a trouble ticket from an employee. The employee is reporting that he can call his manager but his manager cannot call him. The employee is calling from extension 2003 at site
2. His manager is at extension 2002 in site 1. You have verified that both DNs are in the Phones partition. What is the cause of the issue?
A.The location configuration is resulting in insufficient bandwidth for this call.
B.The manager’s CSS does not include Phones partition. C.The manager’s CSS does not include Employee partition.
D.The region configuration is resulting in codec negotiation issue.
Correct:B
10.What problem will occur if an IP helper address is not configured on the router VLAN
subinterface?
A.The phone is unable to acquire an IP address. B.The phone cannot get its VLAN ID assignments.
C.The router cannot route between the VLAN subinterfaces.
D.The router is unable to route between the phone and the CallManager.
Correct:A
11.On a Cisco CallManager Subscriber, a red X appears in the Jobs folder next to a replication job name. Which tool will Cisco TAC use to restore proper replication?
A.DBRepair B.DBSync C.DBHelper D.DBPublish Correct:C
12.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. Correct:C
13.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 Correct:C
14.Following is a partial configuration of an access layer switch: mls qos map cosdscp 0 8 12 16
28 32 40 46 mls qos ! spanningtree mode pvst spanningtree extend systemid ! interface FastEthernet0/1 switchport trunk encapsulation dot1q switchport mode trunk no ip address wrrqueue cosmap 1 6 7 wrrqueue cosmap 2 5 wrrqueue cosmap 3 2 3 4 wrrqueue cosmap 4 0
1 spanningtree portfast ! interface FastEthernet0/2 switchport access vlan 20 switchport trunk encapsulation dot1q switchport mode dynamic desirable switchport voice vlan 20 no ip address mls qos trust device ciscophone mls qos trust cos wrrqueue cosmap 1 6 7 wrrqueue cosmap 2
5 wrrqueue cosmap 3 2 3 4 wrrqueue cosmap 4 0 1 spanningtree portfast ! Voice bearer traffic
is mapped to which queue in FastEthernet0/2?
A.Queue 1
B.Queue 2
C.Queue 3
D.Queue 4
Correct:B
15.Dept16SW4#show runningconfiguration snip ! interface FastEthernet 0/1 port group 1 ! interface FastEthernet 0/2 port group 2 ! interface FastEthernet 0/3 switchport trunk encapsulation dot1q switchport trunk native vlan 16 switchport mode trunk switchport voice vlan 160 spanningtree portfast switchport priority extend trust ! end Dept16SW4#vlan database Dept16SW4(vlan)# show VLAN ISL Id: 1 Name: default Media Type: Ethernet VLAN 802.10 Id:
100001 State: Operational MTU: 1500 VLAN ISL Id: 16 Name: default Media Type: Ethernet VLAN
802.10 Id: 100016 State: Operational MTU: 1500 You have installed a new Catalyst 3524PWR to support a small group of IP telephony users in Department 16. When the IP phones are tested they receive power, but do not communicate with the CallManager. The above show interface FastEthernet 0/3 and show VLAN database. What is the problem?
A.The VLAN and trunk statements are missing from FastEthernet ports 0/1 and 0/2. B.VLAN 160 needs to be entered into the VLAN database.
C.Fast EtherChannel is supported on only the last four ports in a Catalyst 3524PWR. D.VLAN 16 is an 802.1q trunk and not an ISL trunk.
Correct:B
16.You have recently installed a new Catalyst 3524PWR 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 runningconfiguration command there are multiple problems. How can the communication problem with the CallManager be resolved? Dept16SW2#show runningconfiguration ! ! output omitted ! interface FastEthernet 0/6 switchport trunk
encapsulation dot1q switchport trunk native vlan 16 switchport mode trunk switchport voice vlan
169 spanningtree 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.
Correct:A
17.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 costs associated with your company’s tollfree 800 service. When customers call the new local numbers they hear a reorder tone instead of your centralized IPIVR. 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 IPIVRs at each remote location.
Correct:A
18.Your MGCP Gateway is experiencing call setup problems on your PRI to the PSTN. TAC has asked you to send traces to determine the root cause. Which two trace file settings should be configured? (Choose two.)
A.Set Debug Trace Level to Detailed.
B.Select Enable XML Formatted Output for Trace Analysis. C.Select Enable H245 Message Trace.
D.Select Enable ISDN Translation Trace.
Correct:A D
19.Which three questions should be asked of endusers in the Gathering Facts phase? (Choose three.)
A.How often does the problem occur? B.What is the problem?
C.When did the problem occur?
D.Did you make any changes just before the problem occurred?
Correct:A C D
20.A Cisco CallManager installation has just switched to Active Directory. One of the CTI services no longer functions. What is the most likely problem?
A.The CTI server is not authenticating on the PDC. B.The CTI service user is not valid in Active Directory.
C.The CTI service is not recognized as an Active Directory service. D.The CTI server is not running Active Directory.
Correct:B
21.You recently added a Cisco Unity voice mail server to your Cisco CallManager IP telephony solution. Your users are receiving voice mails, but the MWI light does not go off after they have listened to all of their new voice mail messages. What must be verified and possibly modified to
resolve this issue?
A.Use the Port Usage tool to verify that the ports dedicated to MWI on/off are not overutilized. Add another dedicated port if the current port is overutilized.
B.Verify that the MWI “off directory number” has been configured on both the Cisco Unity server and the Cisco CallManager cluster. If it has not been configured, configure it on both the Cisco Unity server and Cisco CallManager cluster.
C.Verify the number of ports licensed for the Cisco Unity server is equal to the number of configured ports. D.Verify that the calls are being sent to the correct ports on the Cisco Unity server. If the configured ports are incorrect on the CallManager cluster, change the values on the cluster to be correct.
Correct:B
22.What happens if CDP is not enabled on a switch port where 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 cannot include the voice VLAN in the uplink trunk.
E.The switch will put the port into the errDisable state until CDP is enabled.
Correct:B
23.IP Phone A at Site 1 can only call IP phones at its own site. A call to Phone B at Site 2 does not work. Following is a partial configuration of the WAN router at site 1: interface Serial0/0 ip address
192.168.12.2 255.255.255.0 ip accessgroup 101 out encapsulation framerelay framerelay map ip
192.168.12.1 101 broadcast ! interface FastEthernet0/0 ! extended ip accesslist 101 permit tcp any any eq 2000 permit icmp any any echoreply ! ip route 0.0.0.0 0.0.0.0 192.168.12.1 Pinging Phone B from PC A yields the following: ping 172.16.6.4 Type escape sequence to abort. Sending 5,
100byte ICMP Echos to 172.16.6.4, timeout is 2 seconds: ….. Success rate is 0 percent (0/5) What
is a likely cause of the problem?
A.There is no IP route to Phone B.
B.There is no IP route to the CallManager.
C.Access list 101 will not permit PC A to ping Phone B.
D.Access list 101 will not permit the IP phones to communicate with each other.
Correct:D
24.During a troubleshooting session, a router’s access list is eliminated as a possible problem. Which step in the Cisco Problem Solving Model does this represent?
A.implementing an action plan B.defining the problem C.gathering facts
D.considering possibilities
Correct:D
25.Drop
Correct:
Green choice1>Yellow Choice3
Green choice2>Yellow Choice4
Green choice3>Yellow Choice1
Green choice4>Yellow Choice2
Green choice5>Yellow Choice5
26.When dialing 1136, which of the following patterns will be selected?
A.1[14]XX B.1[14]XX C.11XX! D.1[^28]XX Correct:C
27.Following is a partial configuration of an access layer switch: mls qos map cosdscp 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
Correct:B
28.Which two operations does this RTM screen display show? (Choose two.)
A.a phone registering
B.a call in process
C.a phone removed from the network
D.a call disconnecting
Correct:A C
29.You have recently installed IP Phones in a centralized model. At a remote branch using an 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 dialpeer configuration issue C.Codec mismatch
D.Call Admission Control
Correct:C
30.Your company has recently installed Cisco Unity to be the voice mail platform for your Cisco CallManager IP telephony system. You have received complaints from the users that the red message waiting indicator (MWI) light does not come on when there are new voice mail messages
in the voice mailboxes. What must be verified and possibly modified to resolve this issue?
(Choose two.)
A.Use the Port Usage tool to verify that the ports dedicated to MWI on/off are not over utilized. Add
another dedicated port if the current port is overutilized.
B.Verify that the MWI on/off numbers are unique within the CallManager cluster dial plan. If they are not, change the directory numbers in the CallManager cluster so they are unique and configure the Cisco Unity server so they match the new directory numbers.
C.Verify that the same directory numbers are being used for MWI on/off in both the Cisco CallManager cluster and Cisco Unity server. If they are different, change the Cisco Unity server to match the Cisco CallManager cluster
D.Verify the number of ports licensed for the Cisco Unity server is equal to the number of configured ports.
If the number of configured ports is greater than the license number, reduce the number of configured ports to be no greater than the license number.
E.Verify that the calls are being sent to the correct ports on the Cisco Unity server. If they are incorrect on the Cisco CallManager cluster, change the values on the cluster to be correct.
Correct:B C
“IP Communications IP Telephony Troubleshooting”, also known as 642-425 exam, is a Cisco certification.
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With the complete collection of questions and answers, 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.
Questions and Answers : 54 Q&As
Updated: March 31st , 2008
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