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Non-repeatered undersea lightwave transmission links, whose signals don't require periodic amplification or regeneration, have historically = As part of larger, undersea networks that use repeaters, and = In domestic non-repeatered systems installed either between islands or With the world's transoceanic cable network rapidly expanding into a global undersea network-and transoceanic systems connected to regional systems, which are then connected to domestic systems-the market is moving towards an increased percentage of shor t-haul, nonrepeatered systems. This paper discusses: -The technologies and products AT&T Submarine Systems, Inc. (AT&T-= Future trends in non-repeatered technology and system design, and -Actual and planned system deployment of undersea optical cable Michael M. Sanders been looping a shoreline.SSI) is developing for this market, throughout the world.Advances in optical ampliiier technol-increased reliability, compatibility with terrestrial systems, upgradability, lower cost, and simpler maintenance. As a result, these systems are now competitive with other transmission systems, including domestic land-based networks, regional radio networks, satellite links, and undersea repeatered links. The developing technologies to support this rapidly evolving and competitive non-repeatered market provide new insights into optical transmission theory, and offer developers significant challenges to increase product performance, decrease cost, and improve delivery schedules. Non-repeatered Design and ArchitectureNon-repeatered systems have a few unique requirements, above and beyond the standard undersea system requirements for high performance, reliable transmission, and

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