Nortel Networks BayStack 450-24T Switch Model AL2012A14 - P/N 308181-A Rev 12. Retired from operational environment. Tested for power - Sold as pictured. If there is anything wrong with the item that you have purchased, please contact us directly and give. us a chance to help, we respond quickly and will ensure you are satisfied with your purchase and experience! Please do not leave negative feedback or open any disputes with eBay or PayPal. Contact us directly and we will fix the problem quickly.Fast & free shipping We strive for 5/5 Star service! Fast & Free shipping!