Access network operators can now offer various services and bandwidths from T1/E1, to 10/100/1000M Ethernet and connect them to a metro network using time division multiplexing (TDM) or wavelength division multiplexing (WDM), all within the same compact system. Dowslake Microsystems , provider of smart network building blocks from Ethernet to WDM, has introduced a converged access and transport system (CATS) optical networking platform. CATS provides various user interfaces, for TDM or WDM, to metro networks regardless of protocols or data rates. Using a 3U 19-in. rack chassis as the basic system, the system accepts all TDM, Ethernet and WDM plug-in cards within the Dowslake product portfolio, such as carrier Ethernet demarcation devices, circuit emulation products, coarse wavelength division multiplexing (CWDM) or WDM or dense wavelength division multiplexing (DWDM) line cards, and multiplexers. Each card can go into a small CPE (customer premises equipment) chassis as a standalone option at customer sites. CATS offers a comprehensive set of network management tools, including local craft interface, SNMP agent and GUI (graphical user interface). In-band or out-of-band management options are available. The network management allows operators to configure services, sell bandwidths, monitor utilization and supervise operations.