Value,Message Description,Reference
0,Reserved,[RFC5611]
1,Bit Rate values disagree.,[RFC5611]
2,"Different trunk types in the case of trunk-specific CESoPSN    
with CAS.",[RFC5611]
3,Requested payload size too big or too small.,[RFC5611]
4,RTP header cannot be generated.,[RFC5611]
5,Requested timestamp clock frequency cannot be generated.,[RFC5611]