同步 TDM 与统计 TDM 的区别

1. 同步时分复用：
同步时分复用 (STDM)，其中存在的每个设备都提供了相同的时隙来传输数据。这不考虑设备是否包含数据。当它们的时隙到达时，设备将它们的数据放置在链路上，当任何设备不包含数据时，其时隙保持为空。有多种时隙被组织成帧，每一帧由一个或多个专用于每个发送设备的时隙组成。

2. 统计 TDM :
统计时分多路复用 (STDM) 是一种技术，用于通过单条传输电缆或线路同时传输多种类型的数据。它通常用于管理通过局域网 (LAN) 或广域网 (WAN) 传输的数据。在这种情况下，数据通常同时从连接到网络的任意数量的输入设备传输，包括计算机、打印机或传真机。它还可用于电话总机设置，以管理同时拨入或拨出多条内部电话线的呼叫。

同步 TDM 和统计 TDM 的区别：

S.No.	Synchronous TDM	Statistical TDM
1.	The data flow of each input connection is divided into units and each input control one output time slot.	The slots are allotted dynamically. Input line is given slots in output frame only if it has data to send.
2.	In this, number of slots in each frame are equal to number of input lines.	In this, number of slots in each frame are less than the number of input lines.
3.	The maximum bandwidth utilization is done when all inputs have data to send.	The volume of link is normally is less than the sum of the volume of each channel.
4.	In this de-multiplexer at receiving end decomposes each frame, discards framing bits and draw out data unit in turn. This draw out data unit from frame is then passed to destination device.	In this de-multiplexer at receiving end decomposes each frame, by checking local address of each data unit. This draw out data unit from frame is then passed to destination device.
5.	It uses synchronization bits at the beginning of each frame.	It does not used synchronization bits.
6.	Slots in this carry data only and there is no need of addressing.	Slots in this contain both data and address of the destination.
7.	In this, buffering is not done, frame is sent after a specific interval of time whether it has data to send or not.	In this, buffering is done and only those inputs are given slots in output frame whose buffer contains data to send.