Spontaneous drops of the LTE interface in Mikrotik Chateau LTE12 with the EG12-EA

IoT Modules LTE-A Module
1

Dear Quectel representatives!
When will the problem with spontaneous drops of the LTE interface in Mikrotik Chateau LTE12 with the EG12-EA module be finally solved? Now it has firmware revision EG12EAPAR01A11M4G, but the problem has not disappeared.
The problem occurs with different SIM cards, different mobile operators.

09:04:32 lte,async,raw lte1: rcvd +QENG: “servingcell”,“NOCONN”,“LTE”,“FDD”,250,99,BC6A607,333,1301,3,4,4,28A,-92,-12,-62,17,-,150,-
09:04:32 lte,async,raw lte1: sent AT+QCAINFO
09:04:32 lte,async,raw lte1: rcvd +QCAINFO: “pcc”,1301,75,“LTE BAND 3”,1,333,-91,-12,-58,15
09:04:32 lte,async,raw lte1: rcvd +QCAINFO: “scc”,3300,50,“LTE BAND 7”,1,999,-118,-15,-93,0
09:04:32 lte,async,raw lte1: rcvd DL
09:04:32 lte,async,raw lte1: sent AT+QXPOWER
09:04:32 lte,async,raw lte1: rcvd +QXPOWER: -80,210,-32768,50
09:04:32 lte,async,raw lte1: sent AT+QNETINFO=“cmr”
09:04:32 lte,async,raw lte1: rcvd +QNETINFO: “cmr”,9,3,1,2
09:04:32 lte,async,raw lte1: sent AT+QRSRP
09:04:32 lte,async,raw lte1: rcvd +QRSRP: -94,-90,-140,-140
09:04:32 lte,async,raw lte1: sent AT+QNWCFG=“lte_rx_power”
09:04:32 lte,async,raw lte1: rcvd +QNWCFG: -61,-57,0,0
09:04:35 lte,packet,raw lte1 mbim: wdm >>> recv #0
09:04:35 lte,packet,raw 07000080 48000000 00000000 01000000
09:04:35 lte,packet,raw 00000000 a289cc33 bcbb8b4f b6b0133e
09:04:35 lte,packet,raw c2aae6df 0a000000 1c000000 00000000
09:04:35 lte,packet,raw 01000000 00000000 00000000 00000000
09:04:35 lte,packet,raw 00000000 00000000
09:04:35 lte,debug lte1 mbim: >>> N service: connect, command: packet service
09:04:35 lte,packet lte1 mbim: status data:
09:04:35 lte,packet 00000000 01000000 00000000 00000000
09:04:35 lte,packet 00000000 00000000 00000000
09:04:35 lte,debug lte1 mbim: packet service: attaching class: 0 nwe:
09:04:35 lte,debug lte1 mbim: state 16=>14
09:04:35 lte,account lte1 session: 89546s 5303094716/1280192518 bytes 4275272/1983497 packets
09:04:35 interface,info lte1 link down

But at this time, the modem correctly responds to the AT + QPING command
[admin@MikroTik] > interface lte at-chat lte1 input=“AT+QPING=1,“netfiles.ru””
output: OK

Then, after a few minutes, the LTE interface spontaneously link up and Internet access appears again.

Technical support from Mikrotik could not establish the cause of the fall of the LTE interface.

image
image877×496 89.7 KB

2

图片
图片785×250 6.57 KB

图片

Thanks for you query in Quectel forums.
According to the AT log screenshot you provided above, the signal quality of the current module test environment is not very good, and the return result of QPING service will be very slow in an environment with poor signal quality. It is suggested to move the module and antenna to a better signal quality environment for testing, and verify whether there is effect in this way first. If you still have problems, you can grab a copy of the QXDM log to provide us with the recurrence problem. You can find the log capturing tool and procedure document at support@quectel.com, thank you.

3

Hi Kerr.Yang-Q!
I moved the module and antenna to a better signal quality environment for testing. But spontaneous link down LTE interface continue every 12-18 hours. Sometimes, lte1 link down after running Spedtest by Ookla (speedtest.net).
I received a response from a Quectel representative (Andrey Cherepanov | Field Application Engineer | Russia, Moscow) to my request on May 19, 2020 at support@quectel.com.
How can I get a copy of the QXDM log from a Mikrotik Chateau LTE12 device?
If it possible, please provide me with special software and instructions for obtaining the QXDM log.
I’m sorry, but I don’t have a wired internet connection. Only 3G / 4G from a mobile operator, no static public IP address.
Best wishes,
Dmitry.

image
image712×323 55.3 KB

1 Like
4

Hi,

I’ve the exact same problem with the firmware EG12EAPAR01A11M4G - EG12-EA modem on Mikrotik Chateau LTE 12.

Before the upgrade of the firmware was working good, but now i’m experiencing continuous disconnections every 4/5 hours. From the web interface the LTE module seems to be connected but without any internet connection. Moreover when it occour, there’s no more CA and only the B7 is connected.

Waiting for some news,

Luca

1 Like
5

Hi Luca!
Quectel has informed me that they are aware of the problem and are working on a fix. I recommend that you write an official request to technical support with a description of the problem at support@quectel.com.
Dmitry

6

Прошел еще месяц. Исправили то проблему с отвалом, или забросили попытки, не в курсе?

7

Everything has been fixed in my copy of the EG12-EA Mikrotik Chateau LTE12 modem. I didn’t even find such AT commands anywhere on the Internet. The guys from Quectel technical support took the QXDM log. What exactly was “corrected” there - maybe for the specific equipment (brand) of the base station in my location, maybe something else - I don’t know. And LTE drops have stopped, even after the launch of Speedtest by Ookla. Thank God.

8

The guys from Quectel don 't want to help product buyers with their equipment ! Watch the branch!

https://forum.ixbt.com/topic.cgi?id=14:66288-69

9

If to be true to the end, then this is the first case known to me when the guys from Quectel’s technical support refused to help and didn’t give specific recommendations for troubleshooting.
The response from Quectel technical support guys has always been very fast. I don’t know why it happened this time. And I’m very sorry about that.

10

Because they don’t care about customers and their product, they sent me to Mikrotik and they drive me here! Damn tennis players! They can 't answer for their products ! Shame!

11

Have you read the responses from Quectel technical support to me in this thread?

The logging tool and procedure document can be found at support@quectel.com, thanks.
The guys from Quectel technical support very quickly provided me with everything I needed, took the QXDM log and now my Mikrotik Chateau LTE12 works well.
I don’t know why some people get tech support and others don’t.

1 Like
12

Mikrotik Chateau LTE12 does not work b7+b7, support support@quectel.com does not help customers

Снимок
Снимок1691×772 92.2 KB

13

I’ve nothing to answer you. I’m so sorry that you have such problems.
I’m russian, I live in Russia and the support knows about it.There is no politics here, I think. Business interests only. There are still problems with receiving and sending SMS messages and receiving responses to USSD requests in Cyrillic. But these questions are already for Mikrotik.

14

3
31656×640 97.7 KB

Здравствуйте, Ротаксов Сергей

К сожалению, у нас нет такой утлиты. Обратитесь напрямую к производителю по адресу support@mikrotik.com

–
Техническая поддержка MIKROTIK.RU
Maxim Fedulov
support@mikrotik.ru
Отдел продаж
+7 (499) 404-10-50
sales@mikrotik.ru

03.08.2022 10:00 - Ротаксов Сергей написал(а):
Здравствуйте! Дайте пожалуйста утилиту для сбора дампа Mikrotik Chateau LTE12 with EG12-EA?
Сергей, добрый день.
Для решения этой проблемы нам нужен дамп сбоя модуля, как вы понимаете видео ролика недостаточно для решения этой проблемы. Дамп собирается с помощью специальной утилиты, которая компилируется Микротик’ом под конкретную версию их ОС из исходников. Пожалуйста, обратитесь в Микротик чтобы они вам предоставили утилиту и инструкцию по сбору дампа.

Хочу Вас сразу предупредить, что решением этой проблемы в первую очередь будет заниматься компания Qualcomm, которая предоставляет сетевой стек. Только после того как они предоставят патч, мы сможем собрать тестовую прошивку. Кроме
Hello, Sergey Rotaksov

Unfortunately, we do not have such an utlita. Contact the manufacturer directly at support@mikrotik.com

–
MIKROTIK technical support.RU
Maxim Fedulov
support@mikrotik.ru
Sales Department
+7 (499) 404-10-50
sales@mikrotik.ru

03.08.2022 10:00 - Sergey Rotaxov wrote:
Hello! Please give me a utility for collecting the dump Mikrotik Chateau LTE12 with EG12-EA?
Sergey, good afternoon.
To solve this problem, we need a dump of the module failure, as you understand, the video clip is not enough to solve this problem. The dump is collected using a special utility that is compiled by Microtik for a specific version of their OS from the source. Please contact Microtik so that they provide you with a utility and instructions for collecting the dump.

I want to warn you right away that the solution to this problem will primarily be handled by Qualcomm, which provides a network stack. Only after they provide a patch, we will be able to build a test firmware. Except

15

6
61664×804 112 KB

Hello, Sergey Rotaksov

Unfortunately, we do not have such an utlita. Contact the manufacturer directly at support@mikrotik.com

–
MIKROTIK technical support.RU
Maxim Fedulov
support@mikrotik.ru
Sales Department
+7 (499) 404-10-50
sales@mikrotik.ru

03.08.2022 10:00 - Sergey Rotaxov wrote:
Hello! Please give me a utility for collecting the dump Mikrotik Chateau LTE12 with EG12-EA?
Sergey, good afternoon.
To solve this problem, we need a dump of the module failure, as you understand, the video clip is not enough to solve this problem. The dump is collected using a special utility that is compiled by Microtik for a specific version of their OS from the source. Please contact Microtik so that they provide you with a utility and instructions for collecting the dump.

I want to warn you right away that the solution to this problem will primarily be handled by Qualcomm, which provides a network stack. Only after they provide a patch will we be able to build

Здравствуйте, Ротаксов Сергей

К сожалению, у нас нет такой утлиты. Обратитесь напрямую к производителю по адресу support@mikrotik.com

–
Техническая поддержка MIKROTIK.RU
Maxim Fedulov
support@mikrotik.ru
Отдел продаж
+7 (499) 404-10-50

16

7
71632×874 124 KB

https://forum.ixbt.com/topic.cgi?id=14:66288-69&r=V5DBECWRS1#2148
We are also discussing problems here!!!

17

Has anyone solved the problem with the modem?

18

The guys from Quectel technical support solved the problem of spontaneous drops of the LTE interface in my Mikrotik Chateau LTE12 for a specific mobile operator base station in my location (aggregation Primary Band 3, CA Band 20). I thank them for this.
I recommend that you contact Quectel Technical Support at support@quectel.com and describe your problem in great detail.

20

The issue is being resolved at the moment, between two teams, Mikrotik&Quectel

1 Like
21

“Teams” play in different leagues: Q is the major league, and M is the village team. :slight_smile: