Which of the following correctly describes typical audio phantom power?
A. 48 volts DC applied to a telephone circuit center pair used to provide power to the telephone set
B. 12 volts DC applied to the tip and ring of a TRS connector used to power amplified headphones
C. A DC voltage applied to the center pin of an RCA type connector used to power remote pre-amplifiers
D. A DC voltage applied to pins 2 and 3 of an XLR connector returning through pin 1, used to power microphones
Which of the following is the Protocol RAS used by the H.323 Gatekeeper?
A. Registration, Alerting, and Status of H.323 Terminals
B. Registration, Access, and Status of H.323 Terminals
C. Registration, Activation, and Status of H.323 Terminals
D. Registration, Admission, and Status of H.323 Terminals
The term "Full Motion Video" typically refers to a transmission of video at which rate?
A. Video Frames at a rate of less than 10 per second
B. Video Frames at a rate of greater than 100 per second
C. Video Frames at a rate of less than 24 per second
D. Video Frames at a rate of 24 or more per second
Media Gateways will:
A. process information for Video File Transfers.
B. process audio for Multipoint Conferencing.
C. provide Bearer to Bearer Channel Switching.
D. provide Bearer Channel termination and Media Stream termination and conversion.
E. terminate Packet Networks.
Frame Relay Virtual Private Networks are capable of providing more bandwidth by controlling and increasing the:
A. Circuit Clock.
B. Network Clock.
C. Variable Bit Rate.
D. Committed Information Rate and Burst Rate.
E. Constant Bit Rate.
Videoconference rate of a H.323 IP Call requires the packet examination of which of the following?
A. Medium Access Control Layer
B. IP Header
C. UDP Header
D. TCP Layer
E. Packet Payload
F. Gatekeeper Registration Request
G. RTP Header
Customer owned Private Branch Exchange is best described as
A. a switch located at the Network Facilities office.
B. a multiplexer located at the customer premise.
C. a switch located at the customer premise.
D. an obsolete network device.
E. All of the above
What does Automatic Gain Control (AGC) do?
A. It turns up the volume to the far-end microphone.
B. It selects among multiple microphones.
C. It turns down the volume to the far-end microphone.
D. It builds the volume to the near-end microphone.
How many "Groups of Blocks" are used to create the Full CIF resolution?
A. 12
B. 48
C. 10
D. 3
Which Protocol and commands would be used to test the network return total delay time?
A. NI-1 and NI-2
B. ETS300
C. Trace Route Request / Reply
D. Trace Path Request / Reply
E. Loop Back Test
F. ICMP Request / Reply
G. ICMP Redirect
H. V.35 Test Interface Commands
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