This Nortel CIENA NTK552AAE5 amplifier has been tested and is ready for use. It is compatible with a single line and has been previously used, but is still in good condition. The model number is WMOGAPXJAC and it is designed for use with computer components and parts. The brand is Nortel, a reliable and reputable manufacturer in the industry. This item is perfect for those seeking a high-quality amplifier for their networking needs. WARRANTY PACIFIC TECHNOLOGIES CALIORNIA 19499224563