Synchronous data link control [ SDLC] adapter 同步数据链路控制适配器
By introducing synchronous clock and token chain, network nodes can share a common data link, and their access control circuits can be as simple as only using several D F/ Fs. 它引入了同步时钟和令牌链,使得各点可共享一条通信数据线而访问控制电路却简单到仅用几个D触发器即可实现。