4f55f5cb_ISDN_Cause_Codes__Cause_Usage
[Cause#] 88 [Fixit!] N/A [Cause Summary] Incompatible destination. [Cause Usage] 
Indicates that the equipment sending this cause has received a request to establish a call has a low layer compatibility, high layer compatibility, or other compatibility attributes (e.g., data rate) which cannot be accommodated.
ISDN Cause Codes
Cause Usage