DWDM和OTN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在一根光纤电缆上，然后这些模块通过使用紧密间隔的波长在同一电缆上传输多个信号来进一步增加系统带宽和容量。通道间距减小到 1.6 nm 或更小。在不更换光纤的情况下增加容量的经济有效的方法。有具有 32 通道及以上容量的商用系统。

2.光传送网(OTN)：
OTN 指的是光传输网络，它允许一个网络范围的框架，为 WDM 设备添加类似 SONET/SDH 的功能，如通信信道、性能监控、故障检测和多路复用层次结构。这在第1层工作，将各种任务累积到WDM技术的隧道中，增加光纤的传输距离和体积。这意味着 OTN 帧结构结合了 SONET 技术的灵活性和 DWDM 的带宽可扩展性，从而可以提供承载客户信号的光通道的传输、复用、路由、管理、监督和生存能力。

DWDM和OTN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.