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Cisco 642-437 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Describe a Dial Plan | 13% | - Call routing and PSTN connectivity - Digit manipulation and route patterns - Dial plan components and functions |
| Describe VoIP Call Legs and Signaling | 20% | - VoIP architecture and call flow - Codec selection and media transport - H.323, SIP, and MGCP protocols |
| Implement QoS for Voice Networks | 15% | - Queuing mechanisms and AutoQoS - Classification, marking, and policing - Call Admission Control - QoS principles and requirements |
| Implement Cisco Unified Communications Manager Express | 18% | - IP phone registration and provisioning - Basic call features and dial plans - CUCME setup and configuration |
| Implement Gatekeeper and Cisco Unified Border Element | 12% | - Interoperability and security - CUBE deployment and features - Gatekeeper functions and configuration |
| Implement Voice Gateways | 22% | - Fax and modem support - Dial peers configuration - Gateway types and deployment models - Analog and digital voice ports |
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
DRAG DROP
The voice gateway selects an inbound VoIP dial peer by matching the information elements in the setup message with the dial peer attributes. From the list on the left, drag the elements to the right and drop them in the order in which a voice gateway matches inbound calls. Not all options are used.
Correct Answer:
Explanation:
Inbound Dial Peers Matching Process
When the Cisco IOS router or gateway receives a call setup request, a dial peer match is made for
the incoming call in order to facilitate routing the call to different session applications. This is not a
digit-by-digit match; rather the full digit string received in the setup request is used to match
against configured dial peers. The router or gateway matches the information elements in the
setup message with the dial peer attributes to select an inbound dial peer. The router or gateway
matches these items in this order:
Called number (DNIS) with the incoming called-number command:
First, the router or gateway attempts to match the called number of the call setup request with the
configured incoming called-number of each dial peer. Because call setups always include DNIS
information, it is recommended to use the incoming called-number command for inbound dial peer
matching. This attribute has matching priority over the answer-address and destination-pattern
commands.
Calling Number (ANI) with the answer-address command:
If no match is found in step 1, the router or gateway attempts to match the calling number of the
call setup request with the answer-address of each dial peer. This attribute can be useful in
situations where you want to match calls based on the calling number (originating).
Calling Number (ANI) with the destination-pattern command:
If no match is found in step 2, the router or gateway attempts to match the calling number of the
call setup request to the destination-pattern of each dial peer. For more information about this, see
the first bullet in the Dial Peer Additional Information section of this document.
Voice-port (associated with the incoming call setup request) with configured dial peer port
(applicable for inbound POTS call legs):
If no match is found in the step 3, the router or gateway attempts to match the configured dial peer
port to the voice-port associated with the incoming call. If multiple dial peers have the same port
configured, the dial peer first added in the configuration is matched.
If no match is found in the first four steps, then the default dial peer 0 command is used.
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Which two options are Cisco recommendations for enabling Cisco Unified Border Element to perform a CAC? (Choose two.)
- A. a voice service VoIP that is configured on the unique Cisco Unified Border Element to enable the CAC service
- B. two Cisco Unified Border Element gateways to enable RSVP-based CAC, with the media flow-through command configured
- C. two Cisco Unified Communications Manager clusters interconnected using a Cisco Unified Border Element
- D. an interconnection of a Cisco Unified Border Element and a Cisco Unified Communications Manager to support both voice and video calls
- E. Cisco Unified Border Element gateways activating RSVP-based CAC, using the media flow-around command
Correct Answer: B,C 🗳️
The file "apps31.9-1-1TH1-16.sbn" is located in the flash memory of the device. Which command should you enter on a Cisco IOS device to serve this file correctly using Trivial File Transfer Protocol?
- A. tftp server:apps31.9-1-1TH1-16.sbn
- B. copy tftp flash:apps31.9-1-1TH1-16.sbn
- C. tftp-server apps31.9-1-1TH1-16.sbn
- D. tftp-server flash:apps31.9-1-1TH1-16.sbn
Correct Answer: D 🗳️
Which Cisco voice feature can you use to connect together two Session Initiation Protocol networks?
- A. class of restriction
- B. SIP gatekeeper
- C. Cisco Unified Border Element
- D. Cisco Transcoding
Correct Answer: C 🗳️
Which statement is true regarding SCCP?
- A. SCCP requires a registrar server.
- B. The protocol is proprietary to Cisco.
- C. A PRI backhaul connection forwards PRI Layer 3 (Q.931) signaling information via a TCP connection from the gateway to the call agent.
- D. Only the IP address is required for the gateway to communicate with Cisco Unified Communications Manager.
- E. SCCP supports the widest range of features on Cisco IP phones.
Correct Answer: B 🗳️
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