4f55f5cb_ISDN_Cause_Codes__Cause_Usage
[Cause#] 49 [Fixit!] N/A [Cause Summary] Quality of Service not available. [Cause Usage] 
Used to report that the requested Quality of Service, as defined in Recommendation X.213, cannot be provided (e.g., throughput ro transit delay cannot be supported).
ISDN Cause Codes
Cause Usage