DWDM和OTN之间的区别

1.密集波分复用器(DWDM) ：
DWDM是指密集波分复用器。正是这些模块将来自不同来源的数据放到光纤电缆上，然后这些模块通过使用紧密间隔的波长在同一根电缆上承载多个信号来进一步增加系统带宽和容量。通道间隔减小到1.6 nm或更小。无需更换光纤即可增加容量的经济有效方式。有商业系统可用，具有32个通道及以上的容量。

2.光传送网(OTN)：
OTN指的是光传输网络，它允许在整个网络范围内添加类似于SONET / SDH的功能，如通信通道，性能监控，故障检测和WDM设备的多路复用层次结构。它在第1层起作用，将各种任务累积到WDM技术的隧道中，从而增加了传输距离和光纤量。这意味着OTN帧结构将SONET技术的灵活性与DWDM的带宽扩展能力结合在一起，从而可以提供承载客户信号的光信道的传输，复用，路由，管理，监督和生存能力。

DWDM和OTN之间的区别：

SR.NO	DWDM	OTN
1.	DWDM is WDM utilizing closely spaced channels.	OTN is asynchronous mapping of payloads.
2.	The networking mode of DWDM is basically point-to-point, chain, star and ring networking.	The networking mode of OTN is usually a ring network, mesh network and other networking modes
3.	This is basically a technology  .	This is the complete set which involves DWDM technology with Manageability features added to it (DWDM) .
4.	It is mainly used in inter provincial trunk network and intra provincial backbone network.	It provides a very ideal solution for large broadband granular services.
5.	Its main component are multiplexer, demultiplexer, amplifier and ROADM.	It is collection of optical cross-connector (OXC) and optical add/drop multiplexer (OADM), possesses functions like optical cross-ability and wavelength conversion.
6.	It is applied in fiber optical transceiver to increase bandwidth over existing fiber optic backbones.	It can provide functionality of transport, management, supervision, multiplexing, routing and survivability of optical channels carrying client signals.
7.	It features include transparency,  dynamic provisioning and  scalability.	It adds features like fault detection, performance monitoring, communication channels, and multiplexing hierarchy to WDM equipment.