642-436 - CVOICE - Cisco Voice over IP Exam
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You have set up Call Admission Control for a customer between their headquarters and manufacturing facility over their Frame Relay WAN. You are using the
All the calls will go through without any quality issues.
You have been asked to deploy a gatekeeper to support CUBE that will connect your organizational domain to the domain of an Internet Telephony Service Provider so that callers can reach the 407 area code. Which configuration will support this function?
gatekeeper zone local GKVIA acme.com 192.168.10.1 zone remote GK407 ITSP.com 10.10.1.100 1719 invia GKVIA outvia GKVIA zone prefix GK407 407* no shutdown
Which mechanism do you use to implement calling privileges on Cisco Unified Communications Manager Express?
Which of the following parameter is checked first when matching inbound dial peers?
called number (DNIS) with incoming called-number
In which three RAS messages is the technology prefix sent? (Choose three.)
Name two standards that are being adopted from by the telecommunicates industry that are used to communicate between applications such as the Cisco CallManager providing IP PBX functionality and unified products such as the GateServer products acquired through the acquisition of Amteva. (Select two.)
The Java Telephone Application Programmable Interface (JTAPI)
The Telephony Application programmable Interface (TAPI)
You are the network engineer at . has its offices in London. You are installing a voice gateway. What do you need to verify? (Choose two.)
The PSTN standards in England.
Encryption capabilities legalities.
Which CUBE configuration will support H.323 protocol interworking and address hiding?
voice service voip allow-connections h323 to h323
Which two codes together make up the number that follows the E.164 recommendation numbering scheme? (Choose two)
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 1212……. 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.
You are the network engineer at . You to connect a Cisco voice gateway to a PBX or the PSTN via ISDN (PRI, QSIG, BRI). What are two attributes of the PBX/PSTN switch that must be known to understand which features to configure on the voice gateway to connect successfully to it? (Choose two)
Which PRI/BRI switch-type is supported by the PBX/PSTN switch.
Whether network or user side is supported by the PBX/PSTN switch.
In North America, which E&M signaling type is used most often for geographically separated equipment?
You are the Lead Network Engineer for your company. Your manager asks what needs to be upgraded on the Network to begin Preparing for the VOIP upgrade. Your Network Campus Consists of One Core Rack of Cat 4000 Switches and 4 closets with BayStack and Synoptics hubs. IP phones will be placed on every desk of the organization and the entire Campus is wired with Cat 5e. From the list below, what needs to be done ? (Select all that apply.)
Upgrade all the Hubbed gear with Cat 4000 series Switches
You are the network engineer at . has an IP network. Your newly appointed trainee wants to know which issues would adversely affect voice quality on the network. What will your reply be?
Jitter, delay, and packet loss
Name two factors that will need to be considered and may provide a hurdle to move forward with your VOIP rollout and IP telephony implementation:
Money Flow issues.
Which statement is true about the MGCP call agent?
Provides only call signaling and call setup.
A telemarketing firm needs to use number translation for incoming and outgoing calls. They have defined two translation profiles, one for incoming and one for outgoing calls. What can be used to simplify this task?
What is the approximate frequency range of human speech?
200 Hz to 9000 Hz
Which statement is true about only out-of-band signaling?
Signaling bits are sent in a special order in a dedicated signaling frame.
What would Receiving an Alarm Indication Signal of Blue indicate on your T1 connection where your voice traffic is going over?
Blue means there is an alarm occurring on the line upstream from the equipment that is connected to the port
A new business in Great Britain needs to have a PSTN connection that will handle a maximum of 30 inbound and outbound calls at any given time. The customer only has one slot available on the designated PSTN router. Which digital line type will you recommend?
ISDN E1 PRI
H.323 is an umbrella Recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network. Which CUBE configuration will support H.323 protocol interworking and address hiding?
voice service voip allow-connections h323 to h323
Where would you assign COR lists in Cisco Unified Communications Manager Express?
When setting up a VoIP call, what is the first thing a gateway router tries to match to a dialed number?
You are the network engineer at . has been using the following dial peer codec command: Codec g729r8 You reconfigure the dial peers with the following command: Codec g729ar8 bytes 10 How will this reconfiguration affect the voice network bandwidth and delay characteristics? (Choose two.)
Delay will decrease on a per call basis.
Bandwidth consumption will increase on a per call basis.
Which type of delay is caused by the line speed of the interface?
What type of connection is considered a call leg?
A logical connection
You are the network technician at . Your newly appointed trainee wants to know what factors affects audio quality. What will your reply be?
Echo and delay variation
Which item correctly describes the relationships between the feature and the category it belongs? 1 Supports analog faxes and modems on a VoIP network 2 Performs call setup and teardown between VoIP networks and the PSTN 3 Interconnects segments of the same or different VoIP networks using different media types 4 Interconnects segments of the same or different VoIP network using different signaling types
Gateway – 1 and 2 CUBE – 3 and 4
Which two codes together make up the number that follows the E.164 recommendation numbering scheme? (Choose two.)
The D channel in ISDN is an example of which two signaling methods? (Choose two.)
What happens if no incoming dial peer matches a router or gateway?
The incoming call leg matches the default dial peer.
What is a logical grouping of directory numbers (DN) and route patterns with similar reachability characteristics when working with IP Telephony?
distributes computer components and has warehouses in New York and Chicago. Headquarters is located in Washington, DC. To keep costs low, all inside sales associates are located at headquarters. Your want to provide a direct analog telephone connection to the inside sales teams from the pick-up counters at the warehouses. This connection should not require the inside sales teams to dial any digits. One of the warehouses is having a problem with their sales phone. You receive the following output: altwhse#show voice port 1/0:1 Foreign Exchange Office Type of VoicePort is E&M Operation State is DORMANT Administrative State is UP The Last Interface Down Failure Cause is Administrative Shutdown Description is not set Noise Regeneration is enabled Non Linear Processing is enabled Music On Hold Threshold is Set to -38 dBm In Gain is Set to 0 dB Out Attenuation is Set to 0 dB Echo Cancellation is enabled Echo Cancel Coverage is set to 8 ms Connection Mode is plar Connection Number is 2000 Initial Time Out is set to 10 s Interdigit Time Out is set to 10 s Call-Disconnect Time Out is set to 60 s Ringing Time Out is set to 180 s Region Tone is set for US What is the cause of the problem?
VoicePort type is incorrect.
You are the network technician at . VoIP is implemented on the network. Your newly appointed trainee wants to know what this implementation uses to carry the payload across the network. What will your reply be?
RTP inside UDP
Which process changes an internal extension into a fully qualified external PSTN number before matching to a dial peer?
Which command sets parameters to search a series of dial peers for a destination that is not in use?
You are the network engineer at . Your newly appointed trainee wants to know which features render VAD ineffective. What will your reply be? (Choose two.)
Music on hold
Which three are supervisory signals? (Choose three)
You are the network engineer at . Your newly appointed trainee wants to know how an endpoint determines the address of the gatekeeper. What will your reply be? (Choose two.)
The endpoint issues a GRQ.
The endpoint is preconfigured to recognize the domain name or IP address of its gatekeeper.
You are the network engineer at . has its headquarters in New York and branch offices in Delaware, Detroit and Denver. You have deployed VoIP over the WAN. user at headquarters complain that early in the day, the quality of calls between headquarters and the branch offices is very good, but as the day progresses and more calls are placed to the branch offices, the quality degrades. The network is using RSVP. The WAN bandwidth to the branch offices allows 4 calls to the Delaware office, 6 calls to the Detroit office, and 8 calls to the Denver office. You want to verify the configuration of Call Admission Control on the headquarters router. What command should you use?
show call rsvp-sync conf
Which device is used to allow an H.323 stream to transit a firewall?
You are the Voice technician at . The network uses RTCP. Your newly appointed trainee wants to know what RTCP does. What will your reply be?
It provides out-of-band control information for an RTP flow.
What is used in the Cisco implementation of T.37?
Special gateways configured as on-ramps and off ramps
Which dial plan characteristic shows the most obvious improvement by dropping a number translation step?
You are the network engineer at . You have configured dial peers in a hunt group for a Support team that answers when the number 5952215 is dialled. The Support team consists of one senior agent and three junior agents. You want the senior agent to receive the incoming call first. Which dial peer should you configure to point to the senior agent?
dial-peer voice 4 pots destination-pattern 5952215 port 1/1/1 preference 0
Which command parameter specifies that the router should not attempt to initiate a trunk connection but should wait for an incoming call before establishing the trunk?
connection-trunk 404555…. answer-mode
Standard PCM encodes voice at which sampling rate?
Site A uses three-digit internal numbers and 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?
Translate all called numbers within Site A to four digits.
You are the network engineer at . You have configured real-time call control processing on the VoIP network. You want to verify this configuration. What command should you use?
debug voip ccapi inout