1. Synchronous Optical Network (SONET) :
SONET stands for Synchronous Optical Network. This is a communication protocol, developed by Bellcore that is used to transmit a large amount of data over relatively larger distances by using optical fiber. By using this, multiple digital data streams are transferred at the same time over the optical fiber.
2. Optical Transport Network (OTN) :
OTN stands for Optical Transport Network. This is a protocol for sending network messaging over optical fiber networks. It is designed to address these issues by delivering a transparent framework to efficiently carry diverse traffic types. Two layers of switching are formed (TDM and WSON) and functions of transport, management, supervision, multiplexing, routing, and survivability are defined.
Difference between SONET and OTN :
|1.||Synchronous mapping of payloads.||Asynchronous mapping of payloads.|
|2.||It is designed to operates on multiple wavelength.||It is designed to operates on multiple wavelength(DWDM).|
|3.||It requires right timing distribution across network.||It does not require timing distribution.|
|4.||It was defined with fixed frame rates.||It was defined with fixed frame sizes.|
|5.||It is less efficiently than OTN.||It is much more efficiently than SONET.|
|6.||It performs multi stage multiplexing.||It performs single stage multiplexing.|
|7.||It scales to maximum of 40Gb/s.||It scales to 100Gb/s (or beyond).|
|8.||It does not has any standard FEC.||It has FEC size for error correction to correct 16 blocks per frames.|