Asterisk (PBX)
ADPCM
G.711(A-law と μ-law)
G.722
G.723.1(パススルーのみ)
G.726(G.726 RFC3551とG.726 AAL2)
G.729 (G.729A)
GSM
iLBC
SLIN (Signed Linear PCM)
LPC-10
Speex (SpeeX)