An IP softphone user is complaining of an echo on external calls. Which of the following is MOST
likely the cause?
A. Headset speaker is too close to the microphone.
B. Routers are introducing feedback.
C. Sidetones are not being filtered.
D. The soundcard volume is set too low.
Answer: A
Which of the following devices has to be connected to every user of an H. 323 conference?
A. Media Gateway Controller
B. Gatekeeper
C. Terminal
D. Multipoint Control Unit (MCU)
Answer: D
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