名词
中文翻译：回拨呼叫交换机
同义词：
['reverting switch', 'reverting switchboard', 'reverting switching system']
例句：
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1. Thecompany's new reverting switch has significantly improved its customer service.
该公司的新回拨交换机显著提高了其客户服务。
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2.The engineer had to revert the call switch to the old configuration before he could fix the problem.
工程师在解决这个问题之前，必须将呼叫交换机切换回旧配置。
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3.The technician was instructed to revert the call switch to a backup line in case of an emergency.
技术人员被指示在紧急情况下将呼叫交换机切换到备用线路。