LS | Title | From | To | Approval date |
3GPP TSG SA4-LS11 (S4-121558) | LS on 3GPP Sa WG4 WID on "Acoustic Requirement and Test Methods for IMS-based Conversational Speech Services over LTE (ART_LTE)" (Feature) | 3GPP TSG SA4 | ETSI TC STQ; GSMA TSG; SG12; | 2012-11-13 |