| Characteristics of a bending-loss insensitive single-mode optical fibre and cable | |
| Fiber Optical Cable | |
| Status | In force |
|---|---|
| Year started | 2006 |
| Latest version | 5.0 August 2024 |
| Organization | ITU-T |
| Committee | ITU-T Study Group 15 |
| Related standards | G.651.1, G.652, G.8201 |
| Domain | telecommunication |
| License | Freely available |
| Website | https://www.itu.int/rec/T-REC-G.657 |
G.657 is an international standard [1] [2] developed by the Standardization Sector of the International Telecommunication Union (ITU-T) that specifies single-mode optical fiber (SMF) cable.
The G.657 Recommendation builds on a previous fiber optic specification in G.652. [3] [4]
G.657 was first published in 2006. Revisions of the standard were since published in 2009, 2012, 2016, and 2024 (August). [5] [6]