Do I have a case to sue my employer because of negligence on the job after I was injured on the job when a fellow employee answered his phone?

In Wisconsin an employee cannot bring a negligence action against his/her employer for an injury sustained on the job. Workers' compensation benefits provide the sole remedy for an on the job injury in the absence of very rare exceptions. If your employer does not provide workers' compensation coverage you may be able to bring a negligence action but your indication that you have already received a permanency rating leads me to believe there is work comp coverage; therefore, a negligence action appears to be out of your reach. You should consult with a good workers' compensation attorney to be sure your rights are fully protected. I would be happy to provide a referral if you choose to contact me for names.