Visitor
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2 Messages
G34 modem slows down to stop working after a day or two
Arris G34 modem just doesn't work as it slows down and stops working every other day. Arris customer support requests that the upstream power level needs to be >45. Xfinity technician can't get it over 45 as the downstream power would be too low. I made Arris sent me another G34 modem and the same thing happens. So I can't blame a bad modem anymore. G34 is not working with Xfinity even though it is supposed to be compatible with Xfinity. Any solution to make G34 work with Xfinity?
XfinityAnthonyT
Official Employee
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1K Messages
2 years ago
Hey there, we wouldn't be able to change the levels remotely but I can send another tech out for you. However, if the issue is that we will not change it to a level the manufacture is saying is needed then we might be at a stalemate. Happy to go over options with you, send a DM to XFINITY SUPPORT with your name and address if you want to!
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BruceW
Gold Problem Solver
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26.4K Messages
2 years ago
Arris began saying that upstream power should be "at least 45 dBmV" several years ago. I don't know why, because it's complete nonsense.
The upstream power levels are controlled automatically and continuously by Comcast's equipment and do not need to be above 45 dBmV. That's because, as long as upstream power is not maxed out, what's important is not the level at the modem, it's the level (and quality) of the modem's signal as received at Comcast, which they control by adjusting the modem's transmit power.
In fact, many customers have service that works perfectly fine with upstream modem power levels below 45 dBmV. Some even operate with the upstream below 35 dBmV. Comcast's signal level ranges are given in https://forums.xfinity.com/conversations/your-home-network/connection-troubleshooting-tips/602da777c5375f08cdea3db9. If Arris' products did not work in those ranges, CableLabs and Comcast would never approve the devices.
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