WDM和SONET之间的区别

在本文中，我们将讨论波分复用(WDM)和同步光网络(SONET)之间的区别。让我们一一讨论。

1.波分复用(WDM)：
WDM代表波分复用。这是一种光纤传输技术，有助于使用多个光波长(或颜色)在同一介质上发送数据。在一根光纤上，两种或多种颜色的光可以传播，并且几个信号可以在光波导中以光谱上不同的波长或不同的频率传输。

2.同步光网络(SONET)：
SONET代表同步光网络。这是Bellcore开发的一种通信协议，用于通过使用光纤在相对较大的距离上传输大量数据。通过使用此功能，可以在光纤上同时传输多个数字数据流。

WDM和SONET之间的区别：

S.No.	WDM	SONET
1.	WDM uses a number of light sources, each emits the light of different wavelengths.	SONET is a optical transmission interface.
2.	The optical multiplexer is used at the input side to multiplex these signals.	SONET aggregates a number of optical signals into higher bit rate signal for transmission over a single fiber using a single wavelength.
3.	This improve the capability of optical cable in carrying data by multiplexing many channel of wavelengths.	This are technologies that are used as a buffer (interfacing) layer for higher layers.
4.	All the signals arrive at the same time, rather of being distributed across time slots.	It uses Time division multiplexing(TDM) or statistical TDM.
5.	The channel spacing is reduces to 1.6 nm or less.	The channel spacing can be carried over WDM, but not vice versa.
6.	The number of channels delivered are 2.	It is easy to isolate one channel from a multiplexed circuit.
7.	The best application is PON.	The best application are ethernet cabling or public telephone network.
8.	The band used here are O and C.	The band used here are STS-1 with fixed size frames.