For acceptable voice calls， the packet error rate should be less than（）%  

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  A . 4 B . 6 C . -67 D . 10

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• Which two statements are true about the protocols that are used for transmitting voice traffic？（）

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• Which statement is NOT a key QoS recommended requirement for voice bearer traffic?（）

  A . Voice traffic should be marked to DSCP EF per the QoS baseline and RFC3246. B . Voice traffic loss should be no more than 3%. C . One-way latency （mouth-to-ear） should be less than 150 msec. D . Average one way jitter should be targeted to less than 30 msec. E . 21-320 Kbps of guaranteed priority bandwidth is required per call depending on sample rate，codec，and layer 2 overhead.

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• Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality  of voice calls？（）

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• （）dBm is the recommended radius of a cell for a voice-ready wireless network.  

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• What are two design considerations for a WLAN to support voice?（）

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• Voice activity detection （VAD） suppresses the transmission of silence patterns. On average， and assuming that a link carries at least 24 calls，what percentage of total bandwidth could VAD save？（）

  A . 5 B . 15 C . 25 D . 35 E . 45 F . 55

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• What voice endpoint is recommended for use with the Cisco Unified Communications 500 Series for small businesses？（）

  A .  IP7961 B .  IP8961 C .  SPA504 D .  SPA9000

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• Which two settings must be configured in order to use the GUI to configure Call Admission Controlwith voice applications？ （）

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