Thank you for asking this question in the support community. The NetVanta 3133 can only be sourced through Covad/Megapath. I would suggest you contact Covad/Megapath to learn about this unit's capabilities and availability. However, if you have any questions on other ADTRAN equipment, such as what to buy or application design, I suggest you contact ADTRAN's pre-sales application engineers.
I will ask the pre-sales team as you suggested. Thanks for the reply.