Audio Codec: G.711 a-law and u-law (for 10, 20, 30 ms packets), G.729/G.729a/G.729b/G.729ab (for 10, 20, 30, 40, 50, 60 ms packets), and G.723 (for 30, 60 ms packets) depending on the audio codec used for this codec set.
Note:
When using G.729 codecs, for outgoing packets, the legacy IP DECT system (ADMM) either uses G.729A or G.729AB.