DNX-1u Access Gateway
Platform for TDM-Centric Radio Access Networks
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Introduction
As demand for mobile communications explodes around the world, network operators are challenged with deploying, scaling, and managing an ever-widening range of voice and data services while trimming expenses and extracting maximum value from existing infrastructure. And expanding services often lead to increased network complexity, especially at the base station. There is a clear need for a solution that consolidates multiple single-function devices, reduces capital and recurring costs (such as backhaul transmission expenses), and improves overall management of the radio access network.
The Sycamore Networks DNX-1u Access Gateway answers the challenge, providing digital cross-connect, traffic grooming, and remote management functionality in a single, integrated system—and establishing a clear migration path to 3G services and beyond.
Traffic and Equipment Consolidation in the RAN
The DNX-1u consolidates equipment by integrating the functions of multiple network elements and enabling diverse services to share common transmission facilities.
With up to eight T1 or E1 short/long haul interfaces, the DNX-1u eliminates the need for external CSU functionality. The Time-Slot Interchanger (TSI) enables grooming for cost-effective backhaul strategies and Automatic Protection Switching (APS) for maximum network availability. A PCM to ADPCM transcoder provides 2:1 compression of legacy voice traffic. Eight ports of 10/100 Ethernet connectivity, combined with Layer 2 switching and channelized/unchannelized routing, eliminate additional devices such as hubs, switches, and routers. Two synchronous EIA-530/ITU X.21/V.35 interfaces provide access for Nx56/64 serial data, while six asynchronous EIA-232/ITU V.24 interfaces provide the terminal server functionality required to manage legacy equipment.
Mobile Base Station Equipment Consolidation — The DNX-1u combines multiple functions in a single, integrated system for cost-effective bandwidth grooming and remote site management.
Improving Management and Reliability
With the DNX-1u installed in a remote site or base station, virtually every device at the site can be managed from a Network Operations Center (NOC) or other centralized location. This alleviates the need to have technical personnel on site, yet properly equips them if dispatch is required. By creating an IP management channel within the backhaul facilities, the DNX-1u delivers visibility to previously unmanaged elements of the network. Terminal server functionality enables remote control of devices limited to craft port access.
Additional management features include contact closure inputs to detect and report failures of collocated equipment (such as air conditioning, access doors, tower lights, etc.), and contact closure outputs to toggle or reset other devices. Differential inputs with user-selectable thresholds offer monitoring and alarming of temperature and voltage. Dual power supplies with independent feeds further enhance reliability.
The DNX-1u Access Gateway from Sycamore Networks provides the foundation for transitioning mobile wireless networks to next generation technologies, while delivering a powerful economic proposition today.
Product Highlights
Wireless Base Station Equipment Consolidation – eliminates the need for discrete network elements such as CSUs, routers, channel banks, telemetry gear, etc.
Capital and Operating Cost Savings – minimizes ongoing capital needs, simplifies sparing requirements, and reduces or eliminates recurring operational expenses in the areas of backhaul cost, space and power consumption, site maintenance and troubleshooting.
Improved Service Availability – incorporates intelligent features such as T1/E1 automatic protection switching (APS) to help ensure service continuity.
Remote Management from Centralized Operations Centers – improves visibility into overall cell site infrastructure, eliminating truck rolls and better informing technicians of site issues when dispatch is required.
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