On page 17 of your owners manual it explains how to turn the ringtone off or you can go here.

http://www.uniden.com/pdf/DECT2080om.pdf

I have a Uniden DECT1588 corded/cordless phone system. I hooked it up yesterday and get a dial tone on each handset but am unable to call out, it's a continuous dial tone. When the phone rings and I pick it up I cannot hear the person on the other end and they can't hear me, it's like a dead line.

Your help would be greatly appreciated. I can't find anything in the manual that explains this.

Thank you.