| In force components | 
| Number 
 | Title | Status | 
| G.711 (11/88) 
 | Pulse code modulation (PCM) of voice frequencies Corresponding ANSI-C code is available in the G.711 module of the ITU-T G.191 Software Tools Library
 | In force 
 | 
| G.711 (1988) Amendment 1 (08/09) 
 | New Annex A on lossless encoding of PCM frames | In force 
 | 
| G.711 (1988) Amendment 2 (11/09) 
 | New Appendix III – Audio quality enhancement toolbox | In force 
 | 
| G.711 Appendix I (09/99) 
 | A high quality low-complexity algorithm for packet loss concealment with G.711 | In force 
 | 
| G.711 Appendix II (02/00) 
 | A comfort noise payload definition for ITU-T G.711 use in packet-based multimedia communication systems | In force 
 |