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移远EC20模块4G全网通工业级无线通信模组，搭配SIM Pool卡池设备，支持多SIM卡远程切换

核心作用

- 集中管理：多SIM卡统一插在SIM Pool设备，EC20通过网络/串口远程调用

- 虚拟SIM（VSIM）：EC20不插实体卡，由SIM Pool提供鉴权数据，实现“一模块多卡”

- 负载均衡/防封：短信/流量/拨号场景自动切卡，避免单卡被运营商封禁

- 远程运维：无需现场插拔，远程切换、激活、检测SIM卡

工作原理（VSIM+SIM Pool）

1. EC20发起SIM鉴权请求，转发到管理服务器

2. 服务器调度，指定SIM Pool中某张卡参与鉴权

3. SIM Pool执行卡操作，返回鉴权结果给服务器

4. 服务器转发给EC20，完成网络注册

3/23 Edited to

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Sim poolCreator

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