having issue during manual dialing

hi all .
actually having problem after hanging up the call but when dial next number from the lead the last call is still in process and the second issue i am facing is that agents gets the voices of other agents who are logged in that conferrence too .
looking forward for ur reply
thankzz
actually having problem after hanging up the call but when dial next number from the lead the last call is still in process and the second issue i am facing is that agents gets the voices of other agents who are logged in that conferrence too .
looking forward for ur reply
thankzz