Arris would recommend the same specs to a Verizon customer as they would a Cox customers. Only a provider can verify the correct specs (Up Power) because its their network, hardware, firmware, etc. As a Cox customer with a different plan and equipment, I'd generally have different specs.
The outage may not have been in your area but instead farther upstream to effect your area. You've got basic connectivity now but it's just not efficient. I'd give Cox a couple days to finish whatever they may be troubleshooting.
If you didn't need a signal booster in your home before...you probably won't need a signal booster.
