The connection constantly comes and goes in recent months. Looks like restarting the modem works but it is annoying.
Only for the purposes of providing instructions to copy the signal data from the modem. The actual modem model can be found on the product sticker at the back of the modem.
Ok, when you have time, log into the modem and navigate to the STATUS .... DOCSIS WAN tab. You'll see two data tables there, an upper table (ignore this) and the lower signal data which starts at the Downstream Overview line.
Park your curser in front of the Downstream Overview line. Hold down the shift key and scroll down, all the way to the bottom right hand corner of the Upstream Overview line. You can also use the arrow keys to scroll down and to the right. Release the shift key, then right click .... Copy.
In a new post, right click .... Paste. That should paste in the table as it appears in the modem.
Can you give that a go so we can see if there's anything obvious in the signal data?