4452d530_able___FreeSWITCH___Confluence__Description
[ITU-T Q.850 Code] 101 [Enumeration] WRONG_CALL_STATE [Cause] message not compatible with call state [Q.850] [Description] 
This cause indicates that a message has been received which is incompatible with the call state.
Hangup Cause Code Table - FreeSWITCH - Confluence
Description