cable modem signal / loss of connection

Thanks for the replay. Since I only have internet there is only a straight coupler in line. As a sanity check I checked the level coming from the street (J Box at side of house). Do you think the attenuator will  still help???

Had a tech come out and they replaced the connecter on the wire from the street, said the led was to short. I've added the reamended -6db attenuator. All has been good for a few weeks now. Until last night when we lost internet. Every check from the Xfinity side said everything was fine. The modem lights were normal.... the only thing that worked was a modem reset. Below is an image of the event log from the modem:

As you can see the last time this happen was 08Nov25. 

switch to an Xfinity router...

Custom support told me everything was fine... Look to me like both Up and Down are outside normal range.

Hey @Staudie, Thank you for visiting our official Xfinity Forums Community support page. We would be more than happy to address any Xfinity Internet concerns that may have populated. Have you had a chance to visit our 'Tips for troubleshooting your Xfinity Internet connection' knowledge base which provides the signal level ranges? It is a very helpful document that I use every day. The Downstream and Upstream power levels do appear slightly out of our recommended ranges. 

Do you happen to have any cable splitters that can be bypassed? Can you also ensure the coax cable is in good condition such as no hard bends, kinks, bite marks, or cuts that could interfere with the communication of the modem over the Xfinity Network?