| LS | Title | From | To | Approval date |
| SG5-LS226 | LS/r on Telecommunication Management and OAM Project Plan (reply to SG2-LS244 and SG2-LS203) | SG5 | SG2; | 2021-12-10 |
| SG2-LS244 | LS on Telecommunication Management and OAM Project Plan | SG2 | SG3; SG5; SG9; SG11; SG12; SG13; SG15; SG16; SG17; SG20; TSAG; | 2021-11-19 |
| SG2-LS203 | LS on Telecommunication Management and OAM Project Plan | SG2 | SG3; SG5; SG9; SG11; SG12; SG13; SG15; SG16; SG17; SG20; TSAG; | 2021-06-11 |