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I have an arris g34 and it drops my internet for about 10 seconds every hour or so. I got a loaner arris dg3450 from my isp and it does not have this issue. 

On wired devices?

On wireless devices (and if so what band)?

On all devices at once? 

A few more details might help


It is on both wired and wireless devices. It is happening on Both 2.4 and 5. 
it was on auto select for the channel but I saw that 2.4 was on 11 and 5 was 161

when it happens it happens to all devices 


In this case we need to check the cable signal level to isolate the issue.

There are some important things that should be within a specific range in order for the internet to work properly.

First, the SNR should be above 33 on all of them. The downstream power should always be between -15 and +15. The closer to 0 the better connection. Finally, your upstream power should always be between +45 and +51

On all of those values you should not have more than 3 decibels (or dB) between the lowest and the highest

By having the values in less than that, your device will have interrupted connection, slow or no connection at all.

Please follow the steps mentioned on the below article to check the cable signal level.

http://arris.force.com/consumers/articles/General_FAQs/G34-G36-Cable-Signal-Levels


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