Home Network Community > All Threads > Can't detect a problem with the WAN connection and won't switch to the USB modem
< All Threads

Can't detect a problem with the WAN connection and won't switch to the USB modem

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.

Can't detect a problem with the WAN connection and won't switch to the USB modem

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Can't detect a problem with the WAN connection and won't switch to the USB modem
Can't detect a problem with the WAN connection and won't switch to the USB modem
2021-08-26 19:53:39 - last edited 2021-08-27 07:58:58
Model: TL-MR3420  
Hardware Version:
Firmware Version:

"Sorry about my English"

I have one alarm with internet monitoring, and I use the TL-MR3420 to have one connection all the time.

The mr3420 is connected to my home internet and the USB modem is the backup system.

What the MR3420 does:

When I switch off the home DSL or I plug off the rj45 the USB modem gives internet access and I still can monitoring my alarm.

The problem

I have one problem when everything is connected and powered, but I plug off the optical connection of my fiber-optic internet, the MR3420 doesn't switch tho the USB modem, and the monitoring of the alarm doesn't work anymore.

best regards.

Sergio

  2      
 
  2      
 
#1
Options
2 Reply
Re:Can't detect a problem with the WAN connection and won't switch to the USB modem
2021-09-01 11:02:04

@serpih 

Hi, May I know the model number of your backup USB modem?

Can I have a screenshot of the advanced>status page when fiber WAN was disconnected?

If it failed to auto-failover, would a manual reboot help?

By the way, what are the hardware and firmware versions of the TL-MR3420?

Thank you very much.

 

Deco Monthly Recap- Check What's Currently Going on With Deco KidShield Test Recruitment, Share Your Ideas With us! Wi-Fi Schedule Ideas Wanted!
  0  
  0  
#2
Options
Re:Can't detect a problem with the WAN connection and won't switch to the USB modem
2021-09-12 11:14:01 - last edited 2021-09-12 11:33:58

@serpih 

 

Hi,

(sorry about the delay and thanks for your help)

The USB modem is HUAWEI but he works well

The tp-link modem is TL-MR3420 v5 00000002

and the firmware is 1.5.0 0.9.1 v0001.0 Build 210319 Rel.39726n.

I have made the update but I still have the same problem.

For me, I think the problem comes from the fact the TP-link doesn't test the connection to the internet but the connection between the TP-link and a powered router.

 

The problem comes only when everything is connected and powered, but I plug off the optical connection of my fiber-optic internet.

 

Maybe the tp-link has one option to try to reach one information outside of my home internet like that he recognizes the problem and switch to the USB backup.

 

Best regards

 

  0  
  0  
#3
Options

Information

Helpful: 2

Views: 624

Replies: 2

Related Articles
TL-MR3420 not detect internet status of ethernet connection.
1048 0
Sim Card can't detect?
738 0
My MR100 can't detect sim card
990 0
Can't detect 5ghz
928 0
MR3420 WAN speed
112 0
Can't detect router on my tp link app
902 0
About Us
Press
Copyright © TP-Link Systems Inc. All rights reserved.