Method,Directionality,Reference
DESCRIBE,C->S,[RFC7826]
GET_PARAMETER,"C->S, S->C",[RFC7826]
OPTIONS,"C->S, S->C",[RFC7826]
PAUSE,C->S,[RFC7826]
PLAY,C->S,[RFC7826]
PLAY_NOTIFY,S->C,[RFC7826]
REDIRECT,S->C,[RFC7826]
SETUP,C->S,[RFC7826]
SET_PARAMETER,"C->S, S->C",[RFC7826]
TEARDOWN,"C->S, S->C",[RFC7826]