So, Just got my new modem and works okay. Based on past experience, I got on chat and asked if it had the latest firmware. I have found that when I have called in the past with some issues with my modems, there were indeed firmware updates that Cox then installed and solved those issues. Especially with a new (to me) modem, they did not push firmware until I asked.
I chatted with a woman who reassured me indeed my CGM4140 had the latest firmware. I asked her if she knew the version and she confidently replied "DOCSIS3.1"
Now, I'm not so sure that I do have the updated firmware. Still get a sense that the modem is not operating as efficiently as it should. No way for me (that I can find) to check firmware version and certainly no way to do anything about it if I could.
Anyone else with issues regarding getting firmware for their CGM4140 - any way to check what version I have?