One-sentence summary
On October 27, 2026, the China Communications Standards Association (CCSA) released official guidance notes on three telecom industry standards: YD/T 6666-2026 for 800Gbit/s OTN interfaces, YD/T 7033-2026 for 5G core multicast-broadcast enhancement, and YD/T 7030/7125-2026 covering the two phases of technical requirements for satellite access to the 5G core network.
Standard Overview
| Item | Details |
|---|---|
| Document type | Official guidance notes on telecom industry standards (YD/T series) |
| Issuing body | China Communications Standards Association (CCSA); industry standards under the Ministry of Industry and Information Technology |
| Release date | Guidance notes published on the CCSA website on October 27, 2026 |
| Approval sequence | MIIT Announcement No. 22 and No. 23 of 2026 (announcement date October 15, 2026), per the CCSA standard release column |
| Coverage | Three guidance notes covering four standard numbers (YD/T 7030 and YD/T 7125 combined in one note) |
Scope of Application
- Optical transport network equipment and system vendors, and carrier network planning departments, for 800Gbit/s high-speed OTN interconnection.
- 5G core network equipment vendors and carrier core network teams working on multicast-broadcast enhancement services.
- Satellite internet and space-ground integrated communication industry players working on satellite access to the 5G core network in phases one and two.
- Telecom standardization organizations and research institutions participating in the standards' development.
Key Clauses
| Standard No. | Title | Technical area | Guidance date |
|---|---|---|---|
| YD/T 6666-2026 | Technical requirements for 800Gbit/s optical transport network (OTN) interfaces | 800G high-speed OTN interfaces | 2026-10-27 |
| YD/T 7033-2026 | Technical requirements for multicast-broadcast enhancement of the 5G mobile communication network core | 5G core multicast/broadcast | 2026-10-27 |
| YD/T 7030-2026 | Technical requirements for satellite access to the 5G core network (Phase 1) | Satellite 5G core, phase one | 2026-10-27 |
| YD/T 7125-2026 | Technical requirements for satellite access to the 5G core network (Phase 2) | Satellite 5G core, phase two | 2026-10-27 |
| Issuing body | China Communications Standards Association (CCSA), MIIT telecom industry standards | Standard guidance column | 2026-10-27 |
Compliance Recommendations
- Equipment vendors can benchmark their products against CCSA's official guidance on the 800G OTN interface requirements in YD/T 6666-2026 and pre-plan interconnection testing with live networks.
- Carriers should factor the multicast-broadcast enhancement requirements and the two-phase space-ground integration requirements into core network expansion and upgrade planning.
- Satellite internet industry players should align terminal and gateway adaptation plans with the phase-one and phase-two requirements for satellite access to the 5G core network.
- Specific technical metrics in the formal texts are subject to the MIIT approval announcements; unpublished details should not be assumed.