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The concept of delivering T1s is almost 30 years old. New technolo- gies like HDSL have been intro- duced but, overall, T1-based ser- vices today are being delivered with the same architecture used in the 1960s. But, while the architec- ture has remained, applications have changed radically. The tele- phone company introduced T1 as a means of delivering message trunks over copper facilities between central offices. No one imagined that T1 would become the preferred vehicle for large amounts of bandwidth to business customers and that its growth in those applications would exceed all expectations | The Lowest Total Cost Solution. Leading the Evolution Rethinking T1 The concept of delivering T1s is almost 30 years old. New technologies like HDSL have been introduced but overall T1-based services today are being delivered with the same architecture used in the 1960s. But while the architecture has remained applications have changed radically. The telephone company introduced T1 as a means of delivering message trunks over copper facilities between central offices. No one imagined that T1 would become the preferred vehicle for large amounts of bandwidth to business customers and that its growth in those applications would exceed all expectations. A Critical source of Revenue T1-based services are expected to grow at 30 to 40 percent annually to meet the demand for HiCap ISDN-PRI Frame Relay Internet access PCS access and ATM services. It has become the primary building block in corporate networks for both high-speed applications and the consolidation of analog voice and data circuits. T1-based facilities serve many medium and large businesses and even some residential locations with telecommuting and small office-homeoffice SOHO applications. More than 60 percent of business sites with 50 or more people use T1s and that percentage is growing. Fast. Who would have thought in 1984 when T1-based customer installations numbered in the dozens that in just a few years that number would be millions Today service providers are struggling to keep up with the demand. At the same time however many are beginning to recognize the limitations of the traditional architecture and are looking for ways of F-Zf-W-7 i i S 5 V -1 -i- fidtttpfe irn- Improving network management Speeding up service delivery Lowering total cost Soneplex Loop Extender Delivering T1s the Old Way In T1s original inter-CO application repeatered trunks were monitored end-to-end by central office-based switches. These switches provided all the network management needed so remote control circuit visibility .