I am sorry that you have not gotten a response sooner. It sounds like you need to submit an RMA request. Below is a link to the ADTRAN.com web page where you can find information, instructions, and even an online submission form for creating an RMA request.
Please let us know if you have any additional questions or need anything else.
Since there have been no more questions on this post, I am marking it as 'Assumed Answered'. Please feel free to mark any correct or helpful answers that may have assisted you. If you still need assistance, please let us know and we will be more than happy to continue working with you.