WDM和SONET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，可促进使用多种光波长(或颜色)在同一介质上发送数据。在一根光纤上，可以传输两种或多种颜色的光，并且可以在光波导中以光谱上的不同波长或不同频率传输多种信号。

2. 同步光网络(SONET)：
SONET 代表同步光网络。这是一种通信协议，由 Bellcore 开发，用于通过使用光纤在相对较大的距离上传输大量数据。通过使用它，多个数字数据流同时通过光纤传输。

WDM和SONET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.