SONET System Synthesizable Soft STS-1 Framer Core

SONET System Synthesizable Soft STS-1 Framer Core


Category: Uncategorized

Created: May 21, 2004

Updated: January 27, 2020

Other project properties

Development Status: Stable

WishBone compliant: No

WishBone version: n/a

License: n/a


Synthesizable soft STS-1 framer core used in SONET at 51.84 Mbps

STS-1 is the basic signal of SONET system working at 51.84 Mbps. It is able to transport the SONET and non-SONET signals by the use of Virtual Tributaries. In the current project the DS-1 data is multiplexed, which is called VT structured STS-1 SPEbecause it is floating in nature. Moreover the system overhead bytes are designed.

NOTE: This project is included as a part of the OpenStacks initiative, Indian Institute of Technology Delhi Department of Electrical Engineering/Optoelectronics and Optical Communication Program. Please visit and

Feeroz Akhter Khan
Dr. Subrat Kar


- Supported Payload
- DS-1 frame
- DS-0 frame
- VT structured SPE i.e. the payload is floating inside the frame
- Byte interleaving
- Error checking Method
- DCC channel support
- Overhead bytes including pointers


- Planning/Under development stage
- More feature are getting included