增值数据业务是指由城域网作为承载网络，由运营商或者运营商与第三方SP合作通过相关业务平台提供的业务。
介绍无线应用协议产生的背景和应用模型，并对其所提供的增值数据业务(尤其是无线电话应用)进行分析和探讨。
This paper introduces the background and application model of wireless application protocol, then discusses the wireless data services, particularly, the wireless telephone application.
它是一种技术更先进、业务更丰富、更具发展潜力的集群通信系统，能满足宽带数据业务和新型增值业务的需求。
It is a trunking communication system which has more advanced technology, richer business, and more potential development, and it can meet the needs of the broadband data and new value-added services.
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