#[Coder name] [Txpayload] [RxPayload] [Ptime]
PCMA 8 8 20;
PCMU 0 0 20;
EVRC 60 60 20;
QC 62 62 20;
G729 18 18 20;
G729B 118 118 20;
GSM 3 3 20;
GSM-EFR 97 97 20;
AMR_4_75 98 98 20;
AMR_5_15 98 98 20;
AMR_5_9 98 98 20;
AMR_6_7 98 98 20;
AMR_7_4 98 98 20;
AMR_7_95 98 98 20;
AMR_10_2 98 98 20;
AMR_12_2 98 98 20;