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对于新的和现有的无线经营者，Ｄ—ＡＭＰＳ１９００双波段８００／１９００ＭＨｚ标准满足了ＰＣＳ对占领市场时间、反向兼容和有成本效益地部署的需要。在终端和网络设计中使用双波段技术，除了在所有现存的蜂窝区市场中，还可在新的ＤＡＭＰＳＰＣＳ市场中向终端用户提供独特的漫游性能。频段间的漫游性能意味着新的ＰＣＳ经营从一开始就能提供全国范围内的无间隙覆盖，使蜂窝区经营者能在他们现有市场中提供ＰＣＳ业务。本文介绍了双波段标准及其在北美和世界其它地方如何有益于ＰＣＳ系统。
For both new and existing wireless operators, the D-AMPS1900 Dual-Band 800 / 1900MHz Standard addresses the PCS’s need for time-to-market, backward compatible and cost-effective deployment. The use of dual-band technology in both terminal and network design will provide end-users with unique roaming capabilities in the new DAMPSPCS market, in addition to all existing cellular market segments. Roaming band-to-band performance means that the new PCS operations have been able to provide nation-wide gap-free coverage from the outset, enabling cell operators to offer PCS services in their existing markets. This article describes the dual-band standard and how it can benefit PCS systems in North America and the rest of the world.