4f55f5cb_ISDN_Cause_Codes__Cause_Usage
[Cause#] 83 [Fixit!] N/A [Cause Summary] A suspended call exists, but this call identify does not. [Cause Usage] 
Indicates that a call resume has been attempted with a call identity that differs from that in use for any presently suspended call(s).
ISDN Cause Codes
Cause Usage