Why the third and forth modems offen offline

when my max-hd4 online for five minutes or one or two hours ,the third and forth modems offline at one time,and they could’t online themselves,when I reboot it,and all the things become normal ,

Post a screenshot of the web dashboard page when they are offline. What does the event log say?

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cellular4 status:


event log as follows
WAN: Cellular 4 disconnected in SIM slot A

And I set the health check settings ,change the ping hosts to other IP addresses,change the health check retry times to 20,recovery retry times to 20,it does’t change anything,cellular 3and 4 offline as usual

So signal strength looks terrible. What is the RSSI RSRP and RSRQ values?

You say on reboot it works fine for a time and then stops working?

Likely that the modems are changing frequency / tower. Screen grab the details page when its working and when its not to compare.

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