4f55f5cb_ISDN_Cause_Codes__Cause_Usage
[Cause#] 100 [Fixit!] N/A [Cause Summary] Invalid information element contents. [Cause Usage] 
Indicates that the equipment sending this cause has received an information element which it has implemented; however, one or more of the fields in the information element are coded in such a way which has not been implemented by the equipment sending this cause.
ISDN Cause Codes
Cause Usage