The benefits of Frame Relay have become apparent to thousands of business users who demand multiple site, high-speed connectivity for data networks. As Frame Relay services continue to grow, the need for port access to existing frame switches has become a consideration in the continued deployment of cost-effective service.ADTRAN's FramePort series of products offers high-speed, high port density access to frame relay switches. Using standard D4 channel bank technology, the FramePort interleaves bursty data traffic from many users into a single DS-1, increasing the efficiency of the service providers' broadband facilities and frame switch resources. The FramePort transforms the D4 channel bank from a Time Division Multiplexer to a Frame Relay Data Multiplexer, offering higher port density and higher subscriber line speeds over current deployment methods. By interleaving data traffic into the DS-1 on a statistical basis, the architecture is not constrained by rate or physical slot restrictions, allowing a single bank to be fully populated. The FramePort 144 is a single D4 channel card equipped with 4 U-interface lines, each capable of rates up to 144 kbps. A single DS1 can support 96 users at 144 kbps each, yielding increases in user density on the order of 8 or 10: 1 over current techniques. The FramePort 768 utilizes SDSL technology to achieve concentration at provisionable rates up to 768 kbps. Both products can be deployed within the same channel bank. The FramePort Series is centrally managed through SNMP and represents no significant administrative burden to today's existing Frame Relay networks. The FramePort enhances the benefits of today's frame relay services using time proven, reliable D4 technology at a very low cost.