| LS | Title | From | To | Approval date |
| COM 3 - LS 17 | NGN studies | SG3 | SG11; IETF; SG13; 3GPP TSG SA5; | 2011-04-01 |
| COM 13 - LS 144 | Reply to COM 3 LS 12, “Reply - Sharing the revised output documents: Y.2233 Rev.1 & Y.2111 Rev.1 Amd.” | SG13 | SG3; | 2011-01-28 |
| COM 13 - LS 116 | Reply to “Reply to ITU-T on “Sharing draft Recommendations ITU-T Y.2233Rev.1 and Y.2111Rev.1Amd””. | SG13 | 3GPP TSG SA5; SG3; 3GPP; ETSI TC TISPAN; JCA-Mgt; ATIS TMOC; 3GPP TSG SA2; | 2010-09-16 |
| COM 3 - LS 12 | Reply - Sharing the revised output documents: Y.2233 Rev.1 & Y.2111 Rev.1 Amd. (COM 13-LS 92) | SG3 | SG13; | 2010-08-31 |
| 3GPP TSG SA5 - LS 3 | Reply to ITU-T on "Sharing draft Recommendations ITU-T Y.2233Rev.1 and Y.2111Rev.1Amd" - Second step | 3GPP TSG SA5 | SG13; | 2010-07-16 |
| COM 13 - LS 92 | Sharing the revised output documents: Y.2233Rev.1 and Y.2111Rev.1Amd | SG13 | SG3; ETSI TC TISPAN; JCA-Mgt; 3GPP TSG SA5; ATIS TMOC; | 2010-01-29 |
| 3GPP TSG SA5 - LS 2 | Reply to ITU-T on "Sharing draft Recommendations ITU-T Y.2233Rev.1 and Y.2111Rev.1Amd" (reply to COM 13-LS 92 Rev.1) | 3GPP TSG SA5 | SG13; 3GPP TSG SA2; SG3; 3GPP TSG CT3; 3GPP TSG CT4; ETSI TC TISPAN; JCA-Mgt; ATIS TMOC; | - |
| IETF - LS 8 | NGN accounting and charging aspects | IETF | SG3; | - |