920-803 Technology Standards and Protocol for IP Telephony Solutions
Note 1: 920-803 Exhibit and all related diagrams are not shown in demo questions.
Note 2: 920-803 Answers are not shown in demo questions.
Exhibits and Answers are only provided in the Full Version.
Note 2: 920-803 Answers are not shown in demo questions.
Exhibits and Answers are only provided in the Full Version.
Demo Question 1.
Which statement best describes the operation used by an echo canceller to reduce echo in digital circuits?
A. It places a large loss (attenuation) in the transmit path when it detects a signal on the receive path.
B. It calculates an estimate of what the echo will be, and then subtract this from the actual returned signal.
C. It develops a mathematical model of the echo that will occur, and then adds this to the signal in the echo return path.
D. It detects a signal on the incoming or outgoing path, and then switches gain into the other path to increase the level of any returning signal.
Display Answer
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