双卡DTU的sim卡切换机制?

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双卡DTU的sim卡切换机制,如下: 1、当信号低,不足以保证通信是切换sim卡; 2、拨号失败,切换sim卡; 3、不能正常连接基站,切换sim卡; 4、连上基站,但模块到主站间网络不通,切换sim卡; 5、到了设置的卡2在线时长,切换到sim卡1;  

Published on 2018-06-26 14:52

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