Netgear CM1200 losing Internet connectivity on a daily basis

Thanks for the suggestions:

>Does the modem loose connection with out the router attached? Connect a wired PC to the modem directly. 

It has been difficult to test that scenario.  The modem reboots and I connect a PC directly to the modem, the performance is great for many hours.  The modem stop responding to ping and loses Internet connections randomly couple of times a day.  It is difficult to take out the WIFI Router and everyone in the house is working from home and dependant on WIFI connections.

>Be sure there are no coax cable line splitters in the between the modem and ISP service box. 

No cable splitters.  No cable TV either requiring the line to be split.  Street Coax is terminating at a junction box through female-to-female connector #1 and then patch cable from the junction box to coax wall jack (female-to-female connection #2) and then directly to the back of the modem port#1 (port aggreation turned disabled).

>Be sure your using good quality RG6 coax cable up to the modem. 

I am testing that at the moment by removing the house coax wire.  going to use a quality RG6 coax cable from the outside juction box directly to the back of the modem.

>Be sure to power OFF the modem for 1 minute them back ON.

I will try the 1 minute.  I am using an IP switch from 5GStore.com to ping the modem and DNS IP addresses continuously.  If timeout for 10 seconds, the IP switch shut the power to the modem for 5 seconds and then back on.  I can try to extend that to one minute.

Once the modem is rebooted, it goes through initialization and then connection are restored with fast throughput.  It is puzzling why he modem stops working (no internet connection or respond to ping every 12 hours or so).