Northern also claims the RS422 interface reduces usage costs and simplifies the installation procedure and training requirements because Dialan lines and voice lines are now provisioned identically, while all testing and diagnostics can be performed from one terminal. The development of a direct RS422 interface on integrated voice and data modules is intended to eliminate the need for expensive converter cables and patch panels between data module vendors and the main distribution frame located in the switch. The Dialan Plus features were jointly developed by Northern Telecom, integrated voice data module vendors and telephone companies. MCI has also announced plans to use SONET in its network, and Bell Atlantic Corp, Contel and United Telephone have also committed to first application testing in 1990.ĭialan Plus, a local area network-based service for the DMS-100 and DMS SuperNode has been designed to improve an end user’s host computer efficiency and information security and so save telephone operators money by simplifying maintenance and provisioning procedures. MCI Communcations Corp will be the first to test S/DMS TransportNode at OC-12, an Optical Carrier rate of 622Mbps, to carry high-volume data between its Reston and Pentagon City, Virginia, computer centres. The demonstration showed S/DMS TransportNode transporting full-motion, full-colour digital video over fibre optic cable with the DV-45 Digital Video Codec, another new Northern Telecom product. It will also support systems delivering 4.976Gbps capacity using optical multiplexing. Once installed, S/DMS will support transmission of 450,000 simultaneous telephone conversations on one fibre, with a single fibre pair survivable ring configuration for long distance, local and metropolitan area networks. S/DMS TransportNode offers 2.488Gbps inter-exchange and local transport and provides management of the high capacity SONET bandwidth. Northern Telecom Ltd has been demonstrating the S/DMS TransportNode, the first of its open networks standards-based Synchronous Optical Network SONET products announced last October and designed for the seamless integration of fibre throughout the entire communications network. Northern Telecom demonstrates S/DMS TransportNode Synchronous Optical Network kit…
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