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Last modified by Xiaoling on 2023/04/24 08:49
From version 6.1
edited by Edwin Chen
on 2023/04/23 22:38
Change comment: Uploaded new attachment "image-20230423223628-1.png", version {1}
To version 1.2
edited by Xiaoling
on 2022/05/17 15:15
Change comment: There is no comment for this version

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1 -= **Introduction** =
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3 -----
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5 -When you use NB-IoT module and run the command **AT+CSG=99,99**. It means the device doesn't attached to the NB-IoT network. If attached to network, the first 99 should be 2~~31.
6 -
7 -(((
8 -Below is the definition for the (% style="color:blue" %)**AT+CSQ**
9 -)))
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11 -[[image:image-20220530094441-1.png]]
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13 -CSQ Definition
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17 -(% style="color:red" %)**In this case, you can check:**
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19 -* Whether the antenna connection is good.
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21 -* Whether you use a valid SIM Card
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23 -* Whether you the SIM card place correctly.
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25 -* Whether the NB-IoT Network you use match the End Device Module support network.
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27 -* Whether you have select the correct band for your operator. See [[Specify_NB-IoT_Band>>doc:Main.Specify NB-IoT Band.WebHome]]
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