EM7421 No internet Access

IoT Modules
1

Hi,

I am having trouble connecting to the internet with my EM7421 modem in Windows 10.

On the desktop, I see the operator name and the “No Internet Access” message under the operator name.

The active network operator name, the DHCP IP address, gateway, and DNS addresses assigned automatically from the operator can be seen properly in the Network Connection Details.

The Bytes statistic sent is e.g. 39414 but Received is 0. It seems like the Sierra modem can not receive data from the Internet…

I have tried to fill the operator APN manually, but it can not be saved due to the next message showing: “Cellular data isn’t working properly. Try again later.”

I updated the EM7421 driver to the latest on your website and the issue is still occurring.

I updated the EM7421 firmware to the latest on your website:
SWI9X50C_01.14.13.00

EM7455 is working in the same unit.

This particular modem does work in Ubuntu (we have an internet connection).

Could you please let me know how I should proceed?

Thank you,
Roei

2

Are you using mbim in At!usbcomp?

What carrier pri are you using?

3

Hi,
I don’t know what it means MBIM, but I changed the value at AT!USBCOMP to 100D but it didn’t work.
I still can’t connect to the internet.

What does it mean carrier pri?
Thank you,
Roei

4

It means the network carrier.
e.g.
Generic/KT

https://source.sierrawireless.com/resources/airprime/minicard/74xx/em_mc74x1-approved-fw-packages/

5

Hi,

I didn’t know that I had tried all the firmware.
When I used the KT firmware, I didn’t have service at all.
When I used the Generic firmware, I couldn’t connect to the internet.

My local operator is Pelephone (LTE).
One of my customers tried the following operators: Vodafone CZ (LTE), T-Mobile CZ (LTE), and O2 CZ (LTE).
Both of us were unable to connect to the internet.

Thank you,
Roei

6

is the APN correctly input in AT+CGDCONT?
Is the AT!GSTATUS? shows module registered to network?

7

Hi,
I’m sorry, I’m not at work right now.
Could you please let me know which details you need and which AT commands you would like me to check?
I will do it on Sunday and provide you with all the details that you need.
Thank you,
Roei

8

is the APN correctly input in AT+CGDCONT?
Is the AT!GSTATUS? shows module registered to network?

9

Hi,
Please see the attached image.

image
image1064×810 74.1 KB

Thank you,
Roei

10

Is the APN correct for the operator?

11

I have tried to fill the operator APN manually, but it can not be saved due to the next message showing: “Cellular data isn’t working properly. Try again later.”

12

How do you fill apn?
AT command?

13

Hi,
I’m trying to fill in the APN settings in Windows.
“Start > Settings > Network & Internet > Cellular > Advanced options > Add an APN.”

When I save the APN, I get the message “Cellular data isn’t working properly. Try again later.”
When using the EM7455, I do not need to fill in the APN, as it does this automatically.
Thank you,
Roei

14

Have you tried to enter in +cgdcont command?
Is “internet.rl” a correct APN?

15

Hi,
I tried entering the following AT command, but I received an error message:
AT+CGDCOND:1, “IP”, “sphone.pelephone.net.il”

16

The APN name “internet.rl” is incorrect. The correct APN name for Pelephone (israel) is “sphone.pelephone.net.il”.

17

How about

At+cgdcont=1,"IP”,"sphone.pelephone.net.il”

18

Hi,
I still get an error message

19

Is there a generic APN that I can use to test the cellular modem?

20

You mean all apn cannot be entered?
(such as “internet” apn)