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YD/T 1634-2025 PDF English

YD/T 1634: Evolution and historical versions

Std ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status
YD/T 1634-2025	English	RFQ	ASK	3 days [Need to translate]	(Optical Transport Network physical layer interfaces)	Valid
YD/T 1634-2016	English	2159	Add to Cart	7 days [Need to translate]	Optical transport network (OTN) physical layer interface	Obsolete
YD/T 1634-2007	English	RFQ	ASK	7 days [Need to translate]	Optical Transport Network Physical Layer Interfaces	Obsolete

Standard ID	YD/T 1634-2025 (YD/T1634-2025)
Description (Translated English)	(Optical Transport Network physical layer interfaces)
Sector / Industry	Telecommunication Industry Standard (Recommended)
Classification of Chinese Standard	M30
Classification of International Standard	33.040.20
Date of Issue	2025-07-02
Date of Implementation	2025-11-01
Older Standard (superseded by this standard)	YD/T 1634-2016
Issuing agency(ies)	Ministry of Industry and Information Technology
Summary	This standard specifies the technical requirements for inter-domain physical layer interfaces (IrDI) in optical networks that can utilize wavelength division multiplexing (WDM) technology. It mainly includes the classification of physical layer interfaces for optical transport networks (OTN), interface compatibility, definitions of optical interface parameters, optical interface parameter values, and optical security considerations. This standard applies to IrDIs for OTN conforming to ITU-T G.709, and also to IrDIs for non-OTN systems incompatible with OTN as defined in ITU-T G.871. This standard applies to intra-office, short-distance, and long-distance systems without line optical amplifiers.