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ITU-T G.959.1

Optical transport network physical layer interfaces

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Organization: ITU-T
Publication Date: 1 July 2018
Status: active
Page Count: 78
scope:

This Recommendation provides physical layer inter-domain interface (IrDI) specifications for optical networks that may employ wavelength division multiplexing (WDM). These interfaces may also be employed, where appropriate, as intra-domain interfaces (IaDI). The physical layer specifications are valid for non-optical transport network (non-OTN) IrDIs, while also allowing application on OTN IrDIs according to [ITU-T G.709]. In the case of a non-OTN IrDI, OTN management capabilities are not required. The IrDIs within the optical transport network (OTN) are provided by unidirectional, point-to-point, single and multichannel line systems. Their primary purpose is to enable transversely compatible interfaces to span the boundary between two administrative domains. The IrDI specifications include intra-office, short-haul and long-haul applications, without line amplifiers

NOTE - For the purposes of this Recommendation, the term "administrative domain" is understood to mean the extent of resources that belong to a single player, such as a network operator, a service provider or an end-user. Administrative domains of different players do not overlap among themselves.

The specifications are organized according to application codes that take into account the many possible combinations of channel counts, optical tributary signal types, span distances, fibre types and system configurations. The reference configuration and application codes form the foundation for specifying the optical networking physical layer parameters.

In this Recommendation, the use of an optical supervisory channel has not been considered (except for the discussion in Appendix IV). Future versions and other new ITU-T Recommendations will further address this aspect of the OTN, possibly involving an arrangement of optical network elements on either side of an optical subnetwork interface that is more complex than point-to-point. For these applications, different parameters beyond those specified for a point-to-point configuration may be required.

This Recommendation presumes that the optical tributary signals transported within network media channels are digital rather than analogue. Specifications for systems enabling transport of analogue optical tributary signals are for further study.

Document History

ITU-T G.959.1
July 1, 2018
Optical transport network physical layer interfaces
This Recommendation provides physical layer inter-domain interface (IrDI) specifications for optical networks that may employ wavelength division multiplexing (WDM). These interfaces may also be...
April 1, 2016
Optical transport network physical layer interfaces
This Recommendation provides physical layer inter-domain interface (IrDI) specifications for optical networks that may employ wavelength division multiplexing (WDM). These interfaces may also be...
February 1, 2012
Optical transport network physical layer interfaces
This Recommendation provides physical layer inter-domain interface (IrDI) specifications for optical networks which may employ wavelength division multiplexing (WDM). These interfaces may also be...
April 1, 2011
Optical transport network physical layer interfaces Amendment 1
This Recommendation provides physical layer inter-domain interface (IrDI) specifications for optical networks which may employ wavelength division multiplexing (WDM). The physical layer...
November 1, 2009
Optical transport network physical layer interfaces
This Recommendation provides physical layer inter-domain interface (IrDI) specifications for optical networks which may employ wavelength division multiplexing (WDM). The physical layer...
March 1, 2008
Optical transport network physical layer interfaces
This Recommendation provides physical layer inter-domain interface (IrDI) specifications for optical networks which may employ wavelength division multiplexing (WDM). The physical layer...
November 7, 2006
Optical transport network physical layer interfaces
A description is not available for this item.
March 1, 2006
Optical transport network physical layer interfaces
A description is not available for this item.
December 1, 2003
Optical transport network physical layer interfaces SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system – Digital line systems
A description is not available for this item.
December 1, 2003
Optical transport network physical layer interfaces SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system – Digital line systems
A description is not available for this item.

References

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