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Cisco 642-437 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Troubleshooting | - Troubleshooting voice and QoS issues
|
| Topic 2: Quality of Service (QoS) | - QoS mechanisms
|
| Topic 3: Cisco Unified Communications Manager Express | - CUCME configuration
|
| Topic 4: VoIP Fundamentals | - Voice over IP basics
|
| Topic 5: Voice Gateways and Call Routing | - Gateway implementation and configuration
|
| Topic 6: Cisco Unified Border Element (CUBE) | - CUBE features and configuration
|
Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:
Which two commands should you use on a common gateway between the two IP telephony networks to enable SIP to H.323 interworking? (Choose two.)
- A. allow-connections sip to h323
- B. allow-connections h323 to sip
- C. voice service h323 to sip
- D. voice service sip to h323
Correct Answer: A,B π³οΈ
What are two benefits of using the DiffServ model? (Choose two.)
- A. DiffServ is highly scalable.
- B. DiffServ uses repetitive signaling for each flow.
- C. DiffServ supports a large number of service classes.
- D. DiffServ is a flow-based architecture.
- E. DiffServ keeps flow state on each node in the network.
Correct Answer: A,C π³οΈ
Which calling privileges command can be used to assign a specific configuring class of restriction list named "restrict" incoming on a dial peer?
- A. corlist restrict
- B. cor assign restrict
- C. COR list restrict inbound
- D. corlist incoming restrict
Correct Answer: D π³οΈ
What do you use an FXS for?
- A. an analog telephone
- B. an E1
- C. an IP phone
- D. a PBX
Correct Answer: A π³οΈ
DRAG DROP
Drag the signaling methods from the left and drop them in the correct position in the graphic on the right. Some methods are used more than once, and some methods may not be used at all.
Correct Answer:
Explanation:
The one thing that distinguishes a PRI from other interfaces is the fact that the data that is received from the PSTN on the D-channel and needs to be carried in its raw form back to the Cisco CallManager to be processed. The gateway does not process or change this signalling data, it simply passes it onto the Cisco CallManager through TCP port 2428. The gateway is still responsible for the termination of the Layer 2 data. That means that all the Q.921 data-link layer connection protocols are terminated on the gateway, but everything above that (Q.931 network layer data and beyond) is passed onto the Cisco CallManager. This also means that the gateway does not bring up the D-channel unless it can communicate with Cisco CallManager to backhaul the Q.931 messages contained in the D-channel.
http://www.cisco.com/en/US/tech/tk1077/technologies_tech_note09186a00801da84e.shtml
