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Cisco Voice Over IP Sample Questions:

1. You have been forwarded some questions by a prospective VoIP customer who would like to know the Cisco default sample size for the G.729 codec. What is it?

A) 10 ms
B) 40 ms
C) 20 ms
D) 30 ms

2. At what point does the MGCP call agent release the setup of the call path to the residential gateways?

A) after the call agent has been notified of an event and has instructed the source residential gateway to create a connection
B) after the call agent has been notified that an event occurred at the source residential gateway
C) after the call agent has sent a connection request to both the source and destination and has relayed a modify-connection request to the source so that the source and destination can set up the call path
D) does not release call path setup
E) after the call agent has forwarded session description protocol information to the destination from the source and has sent a modify connection to the destination and a create-connection request to the source

3. A network has the following characteristics:
?the use of the G.711 codec with a codec speed of 64 kbps ?a 160-byte sample size
?the use of Frame Relay without compressed Real-Time Transport Protocol (CRTP)
?FRF.12 with 6 bytes of overhead
What minimum WAN bandwidth would be required to support three simultaneous VoIP calls?

A) 247200 bps
B) 79200 bps
C) 51600 bps
D) 19200 bps

4. You are working with a potential customer that would like to integrate its existing PBX telephone system into its IP network. The accompanying figure shows that the customer has two offices that need to be connected to the IP network so that the customer can exchange telephone calls without using the PSTN. Both PBXs are currently connected to T1 ISDN circuits.
Which signaling type will allow you to support your customer?

A) FXO
B) QSIG
C) CCS
D) E&M
E) T-CCS
F) CAS

5. Your customer has forwarded this diagram and configuration. The customer wishes to have a connection between its PBXs, a connection that is created and dropped as required. There is one configuration statement missing from each router. What are the two missing statements? (Choose two.)

A) connection tie-line 4045551200
B) connection tie-line 2015551000
C) connection trunk 2015551000404555?
D) connection trunk
E) connection trunk 4045551200
F) connection tie-line 404555?

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