M13 remains an important part of network operations. Carriers need M13 elements that are reliable, cost effective, and conserve space. Adtran has applied its industry leading carrier-class expertise to the MX2800 M13 multiplexer, creating a product that meets the most stringent carrier-class requirements. The MX2800 offers bandwidth consolidation at a low price in the smallest footprint available in the industry, and meets stringent NEBS Level 3 requirements. Measuring only one rack unit high in 19-inch or 23-inch rackmount configurations, this compact device gives NSPs and enterprise users a powerful tool for consolidating 28 T1 signals or 21 E1 signals into a T3 circuit.