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Cisco 642-432 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Voice Quality and QoS | 5% | - QoS mechanisms for VoIP - Delay, jitter, packet loss |
| Topic 2: Introduction to Voice over IP | 15% | - Characteristics of VoIP networks - Voice quality and QoS fundamentals - Voice encoding and compression (G.711, G.729, etc.) |
| Topic 3: Gatekeepers and Advanced Features | 15% | - Call admission control - Connecting to service providers/ITSP - H.323 gatekeeper functions |
| Topic 4: Dial Plan Implementation | 20% | - Dial peers and call legs - Path selection and call routing - Digit manipulation and translation rules |
| Topic 5: Implementing VoIP Gateways | 25% | - MGCP gateway operation - Gateway configuration and troubleshooting - H.323 and SIP gateway concepts |
| Topic 6: Configuring Voice Ports | 20% | - Signaling types: Loop Start, Ground Start, E&M - Voice port configuration and verification - Analog and digital voice ports |
Cisco Voice Over IP Sample Questions:
Refer to the exhibit. Enzo's Bikes manufactures high end bicycle frames. Until recently they sold only to bicycle shops; however, now they are starting to sell to end users. They need a way to add two additional sales staff and ensure that the senior sales technician always gets the first call. Drew is the senior sales technician. Bob is the newest sales technician. Bob's phone should always be the last one chosen for incoming sales calls, after Drew and James. Bob's phone should be chosen first only when Drew and James are busy on calls.
Select the correct dial-peer command set for Bob's phone.
- A. dial-peer voice 3 pots destination-pattern 5555110 preference 0
- B. dial-peer voice 3 pots destination-pattern 5555110 preference firstlast
- C. dial-peer voice 3 pots destination-pattern 5555110 preference high
- D. dial-peer voice 3 pots destination-pattern 5555110 preference 2
- E. dial-peer voice 3 pots destination-pattern 5555110 preference 3 huntstop
Correct Answer: D 🗳️
You have a customer that is interested in determining the number of VoIP calls their Frame Relay WAN links can support. Each of their Frame Relay WAN links has 84 kbps of bandwidth available outside all other applications and overhead. How many G.729 calls using the 8 kbps codec and 20 byte sample size can be supported?
- A. 3
- B. 2
- C. 4
- D. 1
Correct Answer: A 🗳️
In the connection between a Cisco router and an E&M port on a PBX, which side is generally the Cisco side?
- A. signaling unit
- B. switch port
- C. loop start
- D. trunk circuit
Correct Answer: A 🗳️
How is CAS different on E1 and T1?
- A. E1 CAS signaling is out-of-band while T1 is in-band.
- B. T1 has more signaling channels.
- C. T1 uses the D channel for CAS signaling.
- D. E1 uses robbed-bit signaling.
Correct Answer: A 🗳️
Examine the output.
ccm-manager mgcp ! mgcp 5036 ! voice-port 1/0/0 ! voice-port 1/0/1 ! dial-peer voice 1 pots application MGCPAPP port 1/0/0 !
dial-peer voice 2 pots application MGCPAPP port 1/0/1 !
Your customer has sent you their MGCP gateway configuration. They are unable to get the gateway to communicate with the call agent. What command needs to be inserted to resolve the problem?
- A. application MGCPAPP 172.16.1.1
- B. mgcp call-agent 172.16.1.1
- C. mgcp 5036 172.16.1.1
- D. ccm-manager mgcp 172.16.1.1
Correct Answer: B 🗳️
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