[单选]
You are troubleshooting a one-way call problem with a Cisco 7920 wireless IP phone on a standalone WLAN.
What may have caused this problem？（）

A . The minimum data rate is not set to 11 Mbps.
B . Publicly Secure Packet forwarding is enabled.
C . The access point is set to the least congested channel.
D . An address resolution protocol has been disabled.

简单非平衡式车轮制动器是指（）。制动时前后蹄片压向制动鼓的力非常平衡。制动时前后蹄片压向制动鼓的力不平衡。前后蹄片在结构上非常平衡。前后蹄片在结构上非常不平衡。某病人无法控制的反复洗手，这属于（）运动性兴奋。齿轮样震颤。意志增强。强迫动作。垃圾焚烧有哪些特点？目前，我国与人口、计划生育直接相关的法规主要有：（）宪法。人口与计划生育法。计划生育技术服务管理条例和流动人口计划生育工作管理办法。社会抚养费征收管理办法和人口与计划生育条例。混凝土配合比设计中，一般根据（）计算确定单位水泥用量，并取计算值与满足耐久性要求的最小单位水泥用量中的大值。集料粒径。灰石比。砂石料用量。水灰比。

You are troubleshooting a one-way call problem with a Cisco 7920 wireless IP phone on a standalone WLAN.
What may have caused this problem？（）

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[单选] You are troubleshooting a one-way call problem with a Cisco 7920 wireless IP phone on a standalone WLAN. What may have caused this problem？（）

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[单选]
You are troubleshooting a one-way call problem with a Cisco 7920 wireless IP phone on a standalone WLAN.
What may have caused this problem？（）