Service providers are faced with capital constraints and the continuing need to incrementally expand existing infrastructures in a cost-effective manner. They frequently face challenges posed by the limited electrical range of DS3s and DS1s and the cost of converting optical to electrical interfaces for transport through expensive high-capacity network elements.The ADTRAN Total Access OPTI-MX delivers the required features and functions for cost-effective network expansion. This compact, state-of-the-art unit seamlessly integrates with and modernizes existing networks. The Total Access OPTI-MX consolidates discrete optical and multiplexer network elements into one small 2U (3.5-inch high) chassis. Its feature set, small footprint, low cost, and diverse deployment options make the Total Access OPTI-MX a powerful tool that addresses DS1, DS3/EC-1 (STS-1 electrical interface), Ethernet, and optical services delivery to the subscriber. It maintains all of the maintenance and administration tools necessary for service providers to administer their networks efficiently. Its fully integrated design provides the management and redundancy features expected of carrier-class broadband multiplexers.Total Access OPTI-MX is the industry's first OC-3/OC-12 multiplexer to deliver a combination of DS1, DS3/EC-1s, Ethernet, and OC-3 drops. ADTRAN provides the ability to utilize all of the bandwidth in an OC-3 or OC-12 for customer services without stranded bandwidth. Its compact design is significantly smaller than similar products and delivers superior functionality at a fraction of the price.