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1、前言在今后多样化、高度化的社会中,对扩大通信范围的期望将更为强烈,人们将迎来任何时候、任何地点都能通信的时代。对于这种新的要求,从提高通信网功能的观点来看,主要是如何利用目前已有的电话网来提供经济的服务,这在今后的供需均衡时代,将是重要的技术领域之一。在与移动体的通信中,船舶电话、无线呼叫(袖珍
1. Foreword In the future diversified and highly-oriented society, the expectation of expanding the scope of communication will be stronger. People will welcome an era of communication anytime and anywhere. To this new requirement, from the point of view of improving the function of communication network, how to make use of the existing telephone network to provide economic services is an important technical field in the future era of supply and demand equalization. In communications with mobiles, ship calls, wireless calls (Pocket