The device comprises a call request receiving unit, an operation instruction obtaining unit and a call holding execution unit.
所述装置包括：呼叫请求接收单元、操作指令获取单元和呼叫保持执行单元。
The device comprises a call request receiving unit, an operation instruction obtaining unit and a call holding execution unit.
所述装置包括：呼叫请求接收单元、操作指令获取单元和呼叫保持执行单元。
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