Document :

ITU-T SG05  (Study Period 2025)  Contribution  653

Title :

3rd Draft Recommendation ITU-T L.DSBS "Application practice of Direct Current dual-cooling source air conditioner in base station"-for consent

Date :

2026-10-07

Source :

China Tower Corporation Limited (China)

AI/Question :

Q6/5

Meeting :

2026-10-20

Observation :

To be verified by TSB

Access :

Restricted to TIES users [ITU-T]

Abstract :

This contribution defines the principles of the air conditioning system and its operating logic, including multiple cooling modes and the operating conditions for these modes. Furthermore, the Recommendation introduces the interaction control logic with various power supply systems.
The first baseline text of L.DSBS was proposed as TD 788 and discussed in the SG5 plenary (Geneva, October 2025). The second baseline text was discussed in an e-meeting on 18 March 2026. The third baseline text was discussed in the SG5 plenary (Nice, June 2026).
The draft Recommendation primarily updates and refines the following sections: Summary, Keywords, Scope, Definitions, and Operating modes under different power supply sources. In addition, certain descriptions have been revised in accordance with the discussions at the previous meetings.