Having a variable time interval between successive data or information in the form of characters, 操作, 事件. Transmission in which the data or information is individually synchronized or timed usually by start and stop bits (S/S).
异步传输模式的缩写, 一种基于定长交换的高性能组网技术, 53个字节细胞. 自动取款机交换支持语音交换, video, and data; also supports isochronous communication.
A main or high speed transmission facility or medium usually designed to connect lower speed channels or clusters of terminals. 可以描述公共载波主传输路径吗.
A range of frequencies available for signaling; the differences between the highest and lowest frequencies of a band are expressed in (Hz).
A device used to connect two separate 局域网s or used to divide a large 局域网 into smaller 局域网s. Each 局域网 acts as its own 局域网, but uses a bridge device to communicate from one 局域网 to another.
路径或通道, 通常电, 与一个或多个指挥家, 所有设备都能同时接收所有传输.
咨询委员会，国际电话和电报的缩写. An international standards body responsible for setting international communications standards that allow interoperability among telephony and data communications equipment.
载波检测(Detect Carrier Detect)的缩写.
The local telephone company switch that terminates subscribers’ lines for switching and connecting to the public network.
又名. Self-Healing Ring; has two physical transmission lines or rings with transmitting and receiving signals in each ring traveling in opposite directions. 如果线路或环上的设备故障, the ring re-anneals by bypassing the device and or line and forms with the other ring to form a new single ring.
The unwanted transfer of energy from the disturbing circuit to another called the disturbed circuit. 通常来自相邻的模拟信道.
频道服务单位的缩写, a device furnished as an integral part of a digital access line where a user wishes to supply the bipolar signals. It provides the network with protection against user side electrical anomalies such as surges, 并为用户提供网络时钟.
Clear To Send的缩写.
在多模光纤传输中发生的光脉冲的传播. 分散 limits the potential transmission distance because the spread out light pulses reach the destination at different times making the signal unreadable.
数据服务单位的缩写, a DCE used with digital communications circuits to provide digital data services interface. 位于用户所在地, DSU与数据终端设备直接相连, 并提供循环均衡, 远程和本地测试功能, 以及提供标准环境影响评价/TIA或CCITT接口所需的逻辑和时间安排. Converts signals between those used at the 数据终端设备's serial interface and bipolar signals used on the digital network. 网络终端单元(NTU).
电子工业协会的缩写. 环境影响评价, 一个标准的身体, has a set of standards which includes data communications and interface standards among others.
Product name for one of the first popular 局域网 technologies, later standardized as IEEE 802.3.
代表前端处理器. It is an IBM communication controller that routes traffic to and from cluster controllers.
Thin filaments of glass or other transparent material sheathed in an insulator through which a light beam may be transmitted for long distances by means of multiple internal reflections. 一种用于传输数字信息的波导.