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Spec	Title	Releases	WG
26.103	Speech codec list for GSM and UMTS	18.0.0 17.0.0 16.0.0 15.0.0 14.0.0 13.3.0 12.0.0 11.0.0 10.0.0 9.1.0 8.2.0 7.0.0 6.2.0 5.6.0 4.4.0 3.2.0	S4

All information on this page is aggregated from the 3GPP Specfication Status Report page.