New eMTA Arris TM9202?

I saw this new phone modem(eMTA) on Cox supported list and was wondering if they use it now instead of the TM3402. Looks to have a 2.5Gbps port for faster then 1Gbps speed. It's not under "Cox-Provided Modems and Gateways". I thought you can't use retail eMTAs?

https://www.cox.com/residential/support/arris-tm9202.html