Cox Communications is experiencing an outage of voice service across the soutwest region today. Please see https://www.mysuncoast.com/2019/09/03/cox-communications-customers-report-outages-across-us/ for more information. Cox is aware of the issue and is working to resolve it.
For residential service troubleshooting, see https://www.cox.com/residential/support/outages.html
For business service troubleshooting, see https://www.cox.com/business/support/voice.html
For a confidential discussion of your situation or to get some help, give your Technology Partner a call.
The LeeShanok Team