Read the forum guidelines
See also (locked) thread:Only getting max download of 33 Mbps with new DOCSIS 3 Motorola SB6183 16channel modem and Premier upgrade
It took over a week to get to the right folks in support, but eventually the above forum post, mentioned to the @CoxHelp person I was Twitter DM'ing, made all the difference.
Hoping this forum post can help avoid some early adopter pains for other Cox customers who bought a SB6183. Let's hope they add the self-install menu option for this modem soon, so that proper provisioning would be painless.
In their defense, the self install worked for me. It didn't list the modem, but it did pop up with the serial and upon selection brought up the proper modem.In my research, I referenced your site not knowing that your problem had already been corrected.I still wish I was getting more than 8 channels, but I'm sure that will change sooner or later. :)
I saw a relevant post on this on DSLR. Seems like its a known issue. Seems the factory firmware doesn't like how the infrastructure is in some area. But should correct itself once the firmware updates.
@ChrisL I'm having the same issue. Purchased SB6183, new Ultimate customer set up on 12/27/14, only showing 4 downstream channels. What are the appropriate steps to getting 8 downstream channels via this modem? Latest modem stats below.