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一、前 言 数字交换机的接口参数及接口间的传输特性有两类,第一类是模拟接口参数及模拟接口间的传输特性;第二类是数字中继接口参数及接口间的传输特性。数字交换机应满足这两类接口参数和传输特性。木文讨论的是第二类参数和特性的指标测试方法。
I. INTRODUCTION There are two types of interface parameters and the transmission characteristics between interfaces in the digital switch. The first category is the transmission characteristics between the analog interface parameters and the analog interface. The second category is the transmission parameters between the digital trunk interface parameters and the interface. Digital switches should meet these two types of interface parameters and transmission characteristics. Mu Wen discusses the second category of parameters and characteristics of the index test method.