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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 5.1
edited by Xiaoling
on 2022/05/30 09:47
Change comment: There is no comment for this version

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1 -XWiki.Edwin
1 +XWiki.Xiaoling
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1 -= **Introduction** =
1 +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.
2 2  
3 -----
4 -
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 7  (((
8 -Below is the definition for the (% style="color:blue" %)**AT+CSQ**
4 +Below is the definition for the **AT+CSQ**
9 9  )))
10 10  
11 11  [[image:image-20220530094441-1.png]]
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14 14  
15 15  
16 16  
17 -(% style="color:red" %)**In this case, you can check:**
13 +In this case, you can check:
18 18  
19 19  * Whether the antenna connection is good.
20 -
21 21  * Whether you use a valid SIM Card
22 -
23 23  * Whether you the SIM card place correctly.
24 -
25 25  * Whether the NB-IoT Network you use match the End Device Module support network.
26 -
27 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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image-20230423223628-1.png
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