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Updated: May 30, 2026
No. of Questions: 72 Questions & Answers with Testing Engine
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Cisco Voice Over IP Sample Questions:
1. Refer to the exhibit.
Lighthorse Equine Management would like to investigate converging voice and data on their existing T1 Frame Relay WAN link between New York and Atlanta. Currently the following list of applications are consuming no more bandwidth than what is listed on this segment of the network.
T1 link 1536 kbps
e-mail 75 kbps
internet 200 kbps
Oracle 500 kbps
FTP 250 kbps
Total 1025 kbps
The customer has allocated 25% of the WAN link for routing updates and other overhead. They would like to increase the number of samples encapsulated in each PDU to 40 ms. You have calculated 6 bytes of overhead for Frame Relay, no cRTP, and the use of the
G.711 codec.
How many simultaneous calls could be placed on this link?
A) no more than 10 calls
B) 0 calls
C) 2 calls
D) no more than 20 calls
E) 1 call
F) no more than 5 calls
2. What is the approximate frequency range of human speech?
A) 40 Hz to 15,000 Hz
B) 20 Hz to 20,000 Hz
C) 200 Hz to 9000 Hz
D) 600 Hz to 5400 Hz
3. You are meeting with a customer that has deployed IP telephony at their headquarters
location. They would like to roll out IP telephony to their regional office as well. They are now using the G.711 codec at headquarters. They want to be able to maximize the number of calls carried without impacting voice quality or forcing a WAN upgrade. Which codec would be appropriate for their WAN?
A) G.729B
B) G.711
C) G.723.1
D) G.726
4. In T1 CAS, where are the signaling states and control features carried for Super Frame robbed-bit signaling?
A) the first and seventeenth time slot
B) 6th, 12th, 18th, and 24th frame
C) the first and sixteenth time slot
D) 6th and 12th frame
5. A 9 digit number must be dialed to reach numbers on the PSTN. What process makes sure that the first digit 9 is not transmitted as part of the called number?
A) digit seizing
B) digit manipulation
C) digit masking
D) digit alternating
Solutions:
| Question # 1 Answer: E | Question # 2 Answer: C | Question # 3 Answer: A | Question # 4 Answer: D | Question # 5 Answer: B |
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