Why can I not get a dial tone through the communication protection ports of my CyberPower UPS?

First, check to see that the phone cord is securely connected to the UPS and the computer. Next, check to see if you can get a dial tone when you bypass the unit. If you are able to get a dial tone when bypassing the unit, please contact technical support. If you are unable to get a dial tone when bypassing the communication protection ports, please contact your phone company.