Digital communications

# Acknowledgements

Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence

Course image: Kohei314 in Flickr made available under Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence.

Grateful acknowledgement is made to the following source for permission to reproduce material within this unit:

Table 5: 'Nominal central wavelengths for CWDM’, ITU-T G.694.2 Prepublished Recommendation: Spectral Grids for WDM Applications: CWDM wavelength grid, International Telecommunication Union;

Table 6: 'Nominal central frequencies of the DWDM grid’, ITU-T G.691.1 Prepublished Recommendation: Spectral Grids for WDM Applications: DWDM frequency grid, International Telecommunication Union.

All other written material contained within this unit originated at the Open University

Don't miss out:

If reading this text has inspired you to learn more, you may be interested in joining the millions of people who discover our free learning resources and qualifications by visiting The Open University - www.open.edu/openlearn/free-courses

OpenLearn - Digital communications
Except for third party materials and otherwise, this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence, full copyright detail can be found in the acknowledgements section. Please see full copyright statement for details.