In doing some research on the MODEM and router, I found this.
"CAUTION: If you have Cox HSI, before you provision your new SB6120 modem, connect it to your computer and check the firmware version. Once connected to your computer open a browser and type 192.168.100.1, to access the diagnostic pages. If it is 18.104.22.168, call Cox prior to provisioning, to downgrade your modem's firmware. Cox has stated at DSLR Forums that FW 22.214.171.124 does "Brick" modems [...]. "
»Motorola sb6120 issues. Read here
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Motorola SB6120 Cox issues--
"You can observe a lot by watching". Yogi Berra