管理学 电子政务网络技术 释 integrated services digital network; ISDN 综合业务数字网 实现话音、数据和图像在同一个网络中传输与交换的重要技术，是一种典型的电路交换网络系统。
网络与数据通信 协议体系与组成结构 释文 integrated service digital network, ISDN 综合业务数字网
- ring mountain
- Ring Nebula
- ring nebula
- ring-neck pheasant
- ring network
- ring object
- ring of adeles
- ring of algebraic integers
- ring of algebraic Weil cohomology classes
- ring of constants
- ring of differentiable functions
- ring of differential operators
- ring of differential polynomials
- ring of dual numbers
- ring of endomorphisms
- ring of finite generation
- ring of finite presentation
- ring of fractions
- ring of functions
- ring of germs
- ring of integers
- ring of invariants
- ring of Jupiter
- ring of linear transformations
- ring of manifolds