Value,Message Description,Reference
0,Reserved,
1,General request to clear control connection,
2,General error--Error Code indicates the problem,
3,Control channel already exists,
4,Requester is not authorized to establish a control channel,
5,"The protocol version of the requester is not
supported
Error Code indicates highest version supported",
6,Requester is being shut down,
7,Finite State Machine error,
8,Control connection due to mismatching CCDS value,[RFC3308]