| In force components | 
| Number 
 | Title | Status | 
| Y.1540 (12/19) 
 | Internet protocol data communication service - IP packet transfer and availability performance parameters The published text of this Recommendation includes the modifications introduced by ITU-T Y.1540 (2019) Amd.1 (02/2020)
 | In force 
 | 
| Y.1540 (2019) Amendment 1 (02/20) 
 | New Annex B - Additional search algorithm for IP-based capacity parameters and methods of measurement This amendment was never published separately; its content has been included in the published Rec. ITU-T Y.1540 (2019)
 | In force (prepublished) 
 | 
| Y.1540 (2019) Amendment 2 (03/23) 
 | Revised Annex B: Additional search algorithms for IP-based capacity parameters and methods of measurement | In force 
 | 
| 
 | 
| Superseded and Withdrawn components | 
| Number 
 | Title | Status | 
| I.380/Y.1540 (02/99) 
 | Internet protocol data communication service - IP packet transfer and availability performance parameters This Recommendation was renumbered as Y.1540 on 2000-03-10 without further modification
 | Superseded 
 | 
| Y.1540 (12/02) 
 | Internet protocol data communication service - IP packet transfer and availability performance parameters | Superseded 
 | 
| Y.1540 (2002)  Amendment 1 (08/03) 
 | New Appendix VIII: Background on IP service availability | Superseded 
 | 
| Y.1540 (11/07) 
 | Internet protocol data communication service - IP packet transfer and availability performance parameters | Superseded 
 | 
| Y.1540 (2007) Amendment 1 (03/09) 
 | New Appendix VII - Packet performance parameters for optimization of stream repair techniques and New Appendix VIII - IP-layer capacity framework | Superseded 
 | 
| Y.1540 (03/11) 
 | Internet protocol data communication service - IP packet transfer and availability performance parameters | Superseded 
 | 
| Y.1540 (2011) Amendment 1 (01/16) 
 | New Appendix IX - Explanation of TCP-based measurement inadequacy to meet normative requirements | Superseded 
 | 
| Y.1540 (07/16) 
 | Internet protocol data communication service - IP packet transfer and availability performance parameters | Superseded 
 |