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 and in the smallest footprint available in the industry. The equipment meets stringent NEBS Level 3 requirements. Measuring only one rack unit high, this compact device gives NSPs and enterprise users a powerful tool for consolidating 28 T1 signals or 21 E1 signals into a T3 circuit.The MX2800 houses two hot-swappable controller cards that are capable of combining independent T1s, E1s, or T1s and E1s, on the same DS3. The two controller cards also provide built-in 1:1 redundancy for the DS1 and DS3 signals as well as redundant DS3 connections. Advanced diagnostics include CSU loopbacks, NIU loopbacks, C-bit loopbacks and built-in BERT (Bit Error Rate Testing) capabilities. A fully connectorized backplane means no wire wrapping and quick, easy installation.As with all ADTRAN products, the MX2800 offers comprehensive management options, including full management and GUI support from ADTRAN's Total Access EMS. It features a VT100 terminal interface for local configuration. To support SNMP and Telnet management, the MX2800 has an integrated 10Base-T Ethernet port.Carriers who want to maximize their copper investment and consolidate services in the most efficient manner will find that the MX2800 will pay off quickly. For example, a bandwidth reseller who is co-located at an unmanned site and backhauling local and long distance voice service can use the MX2800 to gain T1 access off Hi-Cap SONET rings. The MX2800 is also ideal for Competitive Local Exchange Carriers (CLECs) who are also looking for an efficient means for backhauling local and long distance voice to or from the IXC or LEC. As Internet use continues its rapid expansion, Internet Service Providers are also well served with the MX2800's bandwidth consolidation.