Latency and Disconnect Issues with Battle.net servers.
From this forum:
https://forums.cox.com/forum_home/internet_forum/f/internet-forum/22929/high-latency-and-disconnect-issues-for-cox-customers-when-using-blizzard-entertainment-s-battle-net
...
Hi Brian0101. We will be glad to help in any way we can. Please send an email to cox.help@cox.com and include this link along with any traceroutes, your complete address and name on the account. Thanks, Lisa - Cox Support Forums Moderator