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掉话是GSM网络诸多不良因素的综合体现，掉活率是反映网络质量的重要指标。本文对GSM网络掉话的定义、产生掉话的原因以及减少掉话的措施进行了浅析。
Dropping calls is a comprehensive reflection of many adverse factors in the GSM network. The rate of live-off is an important indicator of network quality. This article analyzes the definition of GSM network dropped calls, the causes of dropped calls and the measures to reduce dropped calls.