digital local exchange meaning in Chinese

数字市话交换机

V interfaces at the digital local exchange - v5 . 1 interface for the support of access network - part 1 : v5 . 1 interface specification
数字局部交换v接口.支持网络通路的v5 . 1接口.第1部分:接口规范
An . v interfaces at the digital local exchange - access network supporting v5 - transmission characteristics and performance design objectives for call handling and bearer channel connection management
数字本地电话交换的v接口.支持v5的接入网络
V interfaces at the digital local exchange - v5 . 2 interface for the support of access network - part 3 : test suite structure and test purposes tss tp specification for the network layer an side endorsement of the english version en 300
本标准适用于以汉语为交换语言的多语种叙词不达意表的编制与修订，不适用于符号化检索语言如数字公式与化学式词表自动标引抽词系统以及不作规范处理的关键词表。