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本文从硬件、干扰、切换、覆盖等几个方面分析了 ＧＳＭ系统掉话产生的主要原因，并提出一些解决掉话的方法。
This article analyzes the main causes of GSM system call drop from several aspects such as hardware, interference, handover and coverage, and puts forward some methods to solve the dropped call.