4f55f5cb_ISDN_Cause_Codes__Cause_Usage
[Cause#] 98 [Fixit!] N/A [Cause Summary] Message not compatible with call state or message type non-existent or not implememted. [Cause Usage] 
Indicates that the equipment sending this cause has received a message such that the procedures do not indicate that this is a permissible message to receive while in the call state, or a STATUS message was received indicating an incompatible call state.
ISDN Cause Codes
Cause Usage