随着竞争的加剧和用户对业务需求的增长 ,电信网络运营商正面临着开放网络的压力 ,以使更多的人员能够参与到业务的开发过程中。这种需求推动了网络 API技术在电信网络中的发展。本文描述了电信网络 API出现的背景 ,并简要介绍了当前广泛接受的两种 API规范 :Parlay API和 JAIN API,然后描述了网络融合的发展趋势 ,并给出了一个基于网络 API的分层业务支撑网模型 As competition intensifies and users’ demand for business grows, telecom network operators are under pressure to open their networks so that more people can participate in the business development process. This demand has driven the development of network API technology in the telecommunication network. This article describes the background of the emergence of telecommunication network API and briefly introduces the two widely accepted API specifications: Parlay API and JAIN API, and then describes the development trend of network convergence and gives a hierarchical network service based on network API Support network model