| LS | Title | From | To | Approval date |
| COM 13 - LS 18 | Reply LS to ITU-T SG 15 on separation between control plane and data plane | SG13 | SG15; | 2013-03-01 |
| COM 15 - LS 441 | Information regarding control plane and data plane separation in FPBN | SG15 | SG13; | 2012-09-21 |