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QUESTION 225
The Cisco CallManager dial plan architecture is set up to handle two general types of calls. What are they? (Choose all that apply.)
A. External calls through a SAA Gateway
B. External calls through a PSTN gateway or to another Cisco CallManager cluster
C. Internal calls From the source router to the PBX-1
D. Internal calls to Cisco IP phones registered to the Cisco CallManager cluster itself-
E. Internal calls from the IP SoftPhone to the 7200 VXR2
F. External calls through the last downstream CallManager phone set.
Correct Answer: BD Section: (none) Explanation
QUESTION 226
From the list below, what protocol is designed to provide end-to-end network transport functions for applications transmitting real-time data, such as audio, video, or simulation data, over Multicast or Unicast network services.
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642-436
A. CAM
B. IPTV
C. STP
D. RTP
E. DMVRP
F. PIM
G. IS-IS
Correct Answer: D Section: (none) Explanation
QUESTION 227
Which statement represents the definition of an MGCP endpoint?
A. The interconnection between packet and traditional telephone networks.
B. Any analog telephony device (PBX, switch, ect).
C. IP hones
D. The gatekeepers in a VoIP network.
Correct Answer: A Section: (none) Explanation
Explanation/Reference:
Explanation: A typical MGCP gateway environment connects on one side with a public switched telephone network (PSTN), and on the other side with an IP network. Specialized call agent applications control the flow of media data across the distributed environment. Call agents determine the route that data follows as it flows through the system. Multiple call agents can control call processing and data transfer. These call agents use a separate protocol to synchronize with each other and to send coherent commands to modules under their control. MGCP assumes a connection model where the basic constructs are endpoints and connections. Endpoints are sources or sinks of data and could be physical or virtual. Examples of physical endpoints are:
*
An interface on a gateway that terminates a trunk connected to a PSTN switch (e.g., Class 5, Class4,
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QUESTION 191
In a VoIP environment when speech samples are framed every 20 ms. a payload of 20 bytes is generated. Assuming a total packet length of 60 bytes, what is the length of the packet header if cRTP is deploued without redundancy checks?
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A. 1 byte
B. 2 bytes
C. 3 bytes
D. 4 bytes
E. 20 bytes
F. 40 bytes
Correct Answer: B Section: (none) Explanation
QUESTION 192
What does the PBX use to determine the destination of a call?
A. An ISDN ANI packet
B. A blocked/permitted call list
C. An analysis of the dialled digits
D. Historic requests from the specific phone extension
Correct Answer: C Section: (none) Explanation
QUESTION 193
Which of the following are CS-ACELP coding schemes? (Choose two)
A. G.711
B. G.728
C. G.729
D. Q.931
E. G-729A
Correct Answer: CE Section: (none) Explanation
QUESTION 194
Which of the following is the worst-case compression delay for CD-ACELP?
A. 2.5 ms
B. 5 ms
C. 7.5ms
D. 10 ms
E. 20 ms
Correct Answer: E Section: (none) Explanation
QUESTION 195
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What type of connection is considered a call leg?
A. A digital connection
B. A virtual connection
C. A logical connection
D. A physical connection
E. A hardwired connection
Correct Answer: C Section: (none) Explanation
QUESTION 196
To which layer of the OSI model does Q.921 signaling equatesto in ISDN?
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QUESTION 157
What is true about H.323 endpoint call setup?
A. Endpoints always do their own call setup.
B. Endpoints require a gatekeeper to do call setup.
C. Endpoints can either do their own setup or be assisted by a gatekeeper.
D. Endpoints require a proxy server to do call setup.
Correct Answer: C Section: (none) Explanation
Explanation/Reference:
Explanation: A gatekeeper is an H.323 entity on the network that provides services such as address translation and network access control for H.323 terminals, gateways, and MCUs. Also, they can provide other services such as bandwidth management, accounting, and dial plans that can be centralized to provide salability. Gatekeepers are logically separated from H.323 endpoints such as terminals and
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gateways. They are optional in an H.323 network, but if a gatekeeper is present, endpoints must use the services provided.
QUESTION 158
Examine the example output hostname GW1 ! interface Ethernet 0/0 ip address 172.16.2.1 255.255.255.0 h323-gateway voip interface h323-gateway voip id GK1-zone1 .abc.com abc.com ipaddr 172.16.2.2 h323-gateway voip h323-id GW1 h323-gateway voip bind srcaddr 172.16.2.1 ! dial-peer voice 1 voip destination-pattern 12.12… … . session-target ras ! dial-peer voice 2 pots destination-pattern 2125551212 no register e164 ! end Choose the command that will restore communication with gatekeeper functionality to this device.
A. h323-gateway voip h323-id GK1
B. gateway
C. h323-gateway voip bind srcaddr 172.16.2.2
D. h323-gateway voip GW1-zone2.abc.com abc.com ipaddr 172.16.2.1
Correct Answer: B Section: (none) Explanation
QUESTION 159
What does a gateway router match to a dialed number when setting up a VoIP call?
A. IP route
B. Destination pattern
C. Call leg
D. Session target
Correct Answer: B Section: (none) Explanation
Explanation/Reference:
Explanation:
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The router selects a dial peer for a call leg by matching the string that is defined by using the answer-address, destination-pattern, or incoming called-number command in the dial peer configuration.
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QUESTION 113
What from the list below combines voice mail, e-mail, and fax into a single application suite where a single application can be used to store and retrieve entire suite of message types?
A. PBSX Listing
B. Name Resolution IPTC
C. Call Manager 3.01
D. Cat 4000 STP v3
E. Unified messaging
Correct Answer: E Section: (none) Explanation
QUESTION 114
In a distributed call processing model, which three are located at each site? (Choose three.)
A. gatekeeper
B. voice messaging
C. media resources
D. Cisco CallManager cluster
Correct Answer: BCD Section: (none) Explanation
Explanation/Reference:
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QUESTION 115
What can be used not only to restrict dialing, but also to identify a subset of a subset of a wildcard pattern (when using the @ wildcard in the North American Dialing Plan)?
A. An IS sheet
B. A ACL
C. A Route Filter
D. A DN top
Correct Answer: C Section: (none) Explanation QUESTION 116
What does the Digit Discard Instruction of PreDot do to the pattern 9.2148134444?
A. prefix a 9 before the “-” if none is dialled
B. discard 2148134444 and send the 9 access code
C. only collect the first four digits counting right to left.
D. change it to 2148134444 before presenting it to the PSTN
Correct Answer: D Section: (none) Explanation
QUESTION 117
What is the key element in call admission control when interconnecting CallManager sitesvia the IP WAN?
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Exam A
QUESTION 1
When setting up a VoIP call, what is the first thing a gateway router tries to match to a dialed number?
A. session target
B. call leg
C. destination pattern
D. IP route
Correct Answer: C Section: (none) Explanation
QUESTION 2
In North America, which E&M signaling type is used most often for geographically separated equipment?
A. Type III
B. Type II
C. Type V
D. Type I
E. Type IV
Correct Answer: B Section: (none) Explanation
QUESTION 3
When using CUBE, which two statements describe how media flow-through differs from media flow-around? (Choose two.)
A. Media flow-through terminates the signaling channel and the RTP streams flow directly between endpoints.
B. Media flow-through terminates the RTP streams but allows signaling to flow directly between endpoints.
C. Media flow-around and media flow-through function in a similar manner, but media flow-around supports NAT traversal.
D. Media flow-around provides address hiding by terminating both signaling and RTP streams.
E. Media flow-through provides address hiding by terminating both signaling and RTP streams.
F. Media flow-around terminates the signaling stream and allows RTP streams to flow directly between endpoints.
Correct Answer: EF Section: (none) Explanation
Explanation/Reference:
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QUESTION 4
Which two are types of Call Admission Control? (Choose two.)
A. gateway zone bandwidth
B. topology-based
C. resource-based
D. gatekeeper-controlled RSVP
E. local
F. QoS-based
Correct Answer: CE Section: (none) Explanation
QUESTION 5
Site A uses three-digit internal numbers and remote Site B uses four-digit internal numbers. All calls to the PSTN are routed through Site B. What dial plan below best represents provision simplicity, assuming the NANP numbering plan?
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Exam A
QUESTION 1
Which two codes together make up the number that follows the E.164 recommendation numbering scheme? (Choose two.)
A. country code
B. subscriber code
C. national destination code
D. provider code
Correct Answer: AB Section: Voice Fundamentals Explanation
Explanation/Reference:
E.164 is an international numbering plan created by the International Telecommunication Union (ITU).
Each number in the E.164 numbering plan
contains the following components:
Country code (CC)
National destination code (NDC – optional)
Subscriber number (SN)
The CC consists of one, two or three digits. It is what we add in order to access different countries and often prefixed with a +
The NDC is the code we often call the area code.
The SN is for telephone numbering. It is given by your phone operator.
E.164 numbers are limited to a maximum length of 15 digits.
For example, the North American Numbering Plan E.164 is as follows:
1-602-555-1212
+
1: Country code
+
602555: National destination code (for North American Numbering Plan, 602 is called the area code while 555 is called Central Office Code)
+
1212: Subscribe Number
Answer C is also correct but just optional. E.164 Numbering Plan must have Country Code and Subscriber Code so A & B are the correct answers.
QUESTION 2
Which statement is true about only out-of-band signaling?
A. A signaling bit is robbed from each frame.
B. Signaling bits are sent in a special order in a dedicated signaling frame.
C. All signaling is directly associated with its corresponding voice frame.
D. All voice packets carry their own signaling.
Correct Answer: B Section: Voice Fundamentals Explanation
Explanation/Reference:
Out-of-Band signaling is telecommunication signaling exchange of information in order to control a telephone call. Out-of-Band signaling uses common channel signaling (CCS), that means signaling information is transmitted using a separate, dedicated signaling channel.
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Exam A
QUESTION 1
Refer to the exhibit. You have been asked to configure a dial peer on R2 that will match only the extensions of the four telephones attached. Which dial-peer statement will you use?
A. dial-peer voice 1 potsdestination-pattern 5552.[0-5]0
B. dial-peer voice 1 potsdestination pattern 5552[5-6].0
C. dial-peer voice 1 potsdestination-pattern 555[2-5][56]
D. dial-peer voice 1 potsdestination-pattern 5552[5-6][05]0
Correct Answer: D Section: Multiple Choice Explanation
Explanation/Reference:
QUESTION 2
Refer to the exhibit. When extension 201-555-1000 dials 404-555-1200, how are the digits manipulated in R1 so that they are presented correctly at R2?
A. The outbound VoIP dial peer is matched and all digits are sent.
B. The digits 404-555 are stripped off before matching the outbound POTS dial peer.
C. The digits 404-555 are stripped off by the connection trunk and R2 receives only 1200.
D. R1 collects the 1200 and prepends the tie-line digits 404555. That number is matched to a VoIP dial peer and sent to the appropriate address.
Correct Answer: A Section: Multiple Choice Explanation
Explanation/Reference:
QUESTION 3
Refer to the exhibit. Your customer wants to converge the existing PBX network with the IP network. The three remote offices have various types of PBXs. The customer is using a combination of tie-lines and trunks to connect the PBXs today. Which kind of connection should be implemented to allow calls to be placed from 201-555-1000 to 727-555-1000 so that when the call is completed, network resources are returned for other uses?
A. PLAR
B. trunk
C. tie-line
D. answer-mode
Correct Answer: C Section: Multiple Choice Explanation
Explanation/Reference:
QUESTION 4
Which dial plan characteristic shows the most obvious improvement by dropping a number translation step?
A. availability
B. post-dial delay
C. scalability
D. hierarchical design
Correct Answer: B Section: Multiple Choice Explanation
Explanation/Reference:
QUESTION 5
Which option istrue concerning the MGCP call agent?