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增量调制(ΔM)与脉码调制(PCM)兼用的数字电话模拟交换网具有灵活、经济及满意的质量等特点,适用于工业通信系统及其它类似场合。本文阐述了这种电话网的设计思想、设计标准及设计方法。
Digital telephone analogue switching networks, both delta-modulation (AM) and pulse code modulation (PCM), are flexible, economical and of satisfactory quality and are suitable for industrial communication systems and other similar applications. This paper describes the design of this telephone network design standards and design methods.