Cisco recommends a decibel referenced to 1 milliwatt signal level for the coverage cell edge at thepredetermined data rate that is needed to support the VoWLAN device and call capacityrequirements. What is that signal level value for Cisco Unified Wireless IP Phones 7920， 7921G， and7925G？（）
- A、-65 dBm
- B、-67 dBm
- C、-69 dBm
- D、-70 dBm
正确答案:B
答案解析:有
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