Ziply Fiber is installed and is working fine. The modem required no change in the Router. The router connected with DHCP to get an IP address from the modem and away we go.
When the Spectrum Service is shut off in a month or so, I’ll move the Ziply Modem to replace the Arris cable modem on the frame.
The frame is wide enough so if I move the White Netgear switch to the left slightly, the Fiber Modem will fit where the Arris Cable modem is now. Velcro is a great way to hold these items down to keep them in place when the cables move.