ITU-T Work Programme

[2025-2028] : [SG15] : [Q11/15]

[Declared patent(s)] - [Associated work] - [Publication]

Work item:

G.709.1

Subject/title:

Flexible OTN common elements

Status:

Approved on 2026-10-22

Approval process:

AAP

Type of work item:

Recommendation

Version:

Rev.

Equivalent number:

Timing:

Liaison:

OIF, IEEE 802.3

Supporting members:

Adtran, China Mobile, CICT, Ciena, Fujitsu, Huawei, Nokia, ZTE

Summary:

The revision adds B1T content, which also includes changing description of OIF assigned PT.

Comment:

Recommendation ITU-T G.709.1 specifies common elements and signal structures used by various types of flexible optical transport network (FlexO) interfaces. Edition 4.0 is a major revision, with a new FlexOPy path networking layer added. The overheads have been renamed based on function instead of location in the frame structure. 1.6T Ethernet clients and associated mapping procedures have been added. Finally, a new FlexO-xo rates is introduced for OTN applications.

Reference(s):

[SG15-TD271/PLEN (2026-06)

]