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23	23	[[image:image-20220527153544-2.png]]
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26	26	= **2. How to Debug if Cellular connection fails** =
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29	29	//If there is a problem with the cellular connection. Please check the below points~://
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	33	+
32	32	== **2.1 Do you order the model with a cellular option** ==
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45	45	[[image:image-20220601110748-1.png]]
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	50	+
48	48	== **2.2 Do you input the SIM card correctly** ==
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77	77	[[image:image-20220527153827-5.png]]
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80	80	== **2.3 Check dialing info** ==
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82	82	//run "**logread -f**" in gateway CLI。//
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84	84	(% class="box" %)
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122	122	)))
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	130	+
125	125	== **2.4 If the following situation occurs, how can users solve this problem?** ==
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133	133	//Regarding what APN your SIM card should use, Users can search for the APN corresponding to the SIM card by Google or ask the carrier.//
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135	135	[[image:image-20220718155937-1.png||height="562" width="497"]]
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	145	+
138	138	=== **2.4.2 The gateway can read the SIM card, But the Internet is displayed as Fail, and at the same time Network displays the carrier network.** ===
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141	141	//It should be SIM card no flow, users can insert SIM cards into the mobile phone for testing.//
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143	143	[[image:1658131428288-728.png||height="538" width="494"]]
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146	146	=== **2.4.3 The gateway can't read the SIM card, and the Internet is displayed as Fail.** ===
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149	149	//Users need to check whether the SIM card type is suitable for the EC25 module.//
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151	151	[[image:1658131612484-845.png||height="549" width="499"]]
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154	154	=== **2.4.4 SIM display：~*~**SIM ERROR~*~** Check SIM is inserted test SIM in a mobile phone？** ===
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157	157	//Users can insert SIM cards into the mobile phone for testing.//
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159	159	[[image:image-20220718160804-3.png||height="602" width="500"]]
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161	161	= **3. Share Cellular Network for WiFi & LAN clients** =
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215	215	**Enable Cellular and connect Ethernet at the same time**
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217		-ETH icon is displayed as ​​​ [[image:1658135519305-444.png]] Indicates that Ethernet is the main working network.
	232	+ETH icon is displayed as ​​​ [[image:1658135519305-444.png||height="18" width="19"]] Indicates that Ethernet is the main working network.
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219		-Cell icon is displayed as  [[image:1658135500498-725.png]] Indicates that Cellular is the backup WAN.
	234	+Cell icon is displayed as  [[image:1658135500498-725.png||height="17" width="17"]] Indicates that Cellular is the backup WAN.
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	237	+(% style="display:none" %) (%%)
	238	+
222	222	== **4.1 Switching between Cellular and Ethernet networks** ==
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232	232	[[image:image-20220606140859-4.png||height="687" width="1107"]]
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	251	+(% style="display:none" %) (%%)
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	253	+
235	235	== **4.2 Switching between Cellular and WiFi networks** ==
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238	238	(% class="wikigeneratedid" %)
239	239	//Enable **Cellular** and connect **WiFi** at the same time//
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241		-//WiFi icon is displayed as ​​​//[[image:1658135519305-444.png]]// Indicates that WiFi is the main working network.//
	260	+//WiFi icon is displayed as ​​​//[[image:1658135519305-444.png||height="23" width="24"]] Indicates that WiFi is the main working network.
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243		-//Cell icon is displayed as  //[[image:1658135500498-725.png]]// Indicates that Cellular is the backup WAN.//
	262	+//Cell icon is displayed as  //[[image:1658135500498-725.png||height="23" width="22"]]// Indicates that Cellular is the backup WAN.//
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245	245	[[image:image-20220606141113-7.png||height="678" width="1106"]]
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250	250	[[image:image-20220606140932-5.png||height="687" width="1107"]]
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253	253	== **4.3 At the same time start Cellular and Ethernet and Wi-Fi networks** ==
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256	256	[[image:image-20220606140328-1.png||height="682" width="1108"]]
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259	259	)))
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282	282	(% class="box infomessage" %)
283	283	(((
284		-(% style="color:black" %)**Serial Device :** (% style="color:#037691" %)**/dev/ttyModemAT**
	306	+**Serial Device :** (% style="color:#037691" %)**/dev/ttyModemAT**
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286		-(% style="color:black" %)**Bps/Par/Bits :**(% style="color:#037691" %)** 9600 8N1**
	308	+**Bps/Par/Bits :(% style="color:#037691" %) 9600 8N1(%%)**
287	287	)))
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290		-//**Note: Enter the corresponding letter to change the configuration, like A,B,C**//
	312	+(% style="color:red" %)//**Note: Enter the corresponding letter to change the configuration, like A,B,C**//
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292	292	[[image:image-20220527154154-7.png]]
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295		-//Enter **AT+GSN **in the interface to get the IMEI,//
	317	+(((
	318	+//Enter (% style="color:blue" %)**AT+GSN **(%%)in the interface to get the IMEI,//
	319	+)))
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297		-// **For example (% style="color:#037691" %)860548042566627(%%)**//
	321	+(((
	322	+//**For example: (% style="color:#037691" %)860548042566627(%%)**//
	323	+)))
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299	299	(% class="box infomessage" %)
300	300	(((
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306	306	[[image:image-20220527154231-8.png]]
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309	309	= **6. How does the gateway connect to the network via a USB 4G Dongle** =
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