4f55f5cb_ISDN_Cause_Codes__Cause_Usage
[Cause#] 41 [Fixit!] N/A [Cause Summary] Temporary failure. [Cause Usage] 
Indicates that the network is not functioning correctly and that the condition is not likely to last a long period of time: e.g., the user may wish to try another call attempt almost immediately.
ISDN Cause Codes
Cause Usage