[单选]
You are troubleshooting a problem with a cisco 7920 wireless ip phone on a standalone wlan. the phone rings but， when you Answer ，the call is dropped.
What may have caused this problem？（）

A . publicly secure packet forwarding is enabled.
B . the minimum data rate is not set to 11 mbps.
C . an address resolution protocol is enabled.
D . the access point is set to the least congested channel.

证券投资基金根据其组织形式不同，可以分为（）。开放型基金。封闭型基金。契约型基金。公司型基金。收入型投资基金。补充侦查以（）次为限 1。 2。 3。 5。 Which two benefits of network integration would be critical to a large metropolitan hospital？（） computerization of order entry for physicians。 compliance with HIPPA requirements。 improved bandwidth。 greater fault tolerance。 What does a broad-spectrum interferer lower？（） SNR。 noise floor。 level of interference。 Received Signal Strength Indicator。某肾结核患者，行肾部分切除术后。以下护理措施错误的是（）观察尿液变化。鼓励患者多饮水。嘱尽早下床活动。保持引流通畅。继续抗结核药物治疗。

You are troubleshooting a problem with a cisco 7920 wireless ip phone on a standalone wlan. the phone rings but， when you Answer ，the call is dropped.
What may have caused this problem？（）

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[单选] You are troubleshooting a problem with a cisco 7920 wireless ip phone on a standalone wlan. the phone rings but， when you Answer ，the call is dropped. What may have caused this problem？（）

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[单选]
You are troubleshooting a problem with a cisco 7920 wireless ip phone on a standalone wlan. the phone rings but， when you Answer ，the call is dropped.
What may have caused this problem？（）