交换机

• Refers to the per cent of main lines connected to digital exchanges
  指连接到数字交换机的主线百分比。
• Centrex centralized extension system
  集中式用户专用交换机
• Coastal mobile telephone switching system
  船舶电话交换机
• A . switches are primarily software based while bridges are hardware based
  交换机基于软件而桥基于硬件
• Outage : a backbone switch failed . . . see technical news
  由于主力交换机出问题而停机，详情请看技术新闻。
• Technical specification for ethernet switch with routing capability
  具有路由功能的以太网交换机技术要求
• Private automatic branch exchange pabx
  专用自动小交换机
• Technical specification of atm switch
  Atm交换机技术规范
• Private automatic branch exchange , pabx
  用户自动交换机
• Combined local and tandem exchange
  市话汇接合用交换机