Hi Sal,
Yes, if no match is made, it will check the FallbackSubjects you’ve configured, in the order you’ve set: first to "tollfree," then to "international."
For a better understanding, here’s an example from the RatingProfiles.csv:
RatingProfiles.csv
#Tenant,Category,Subject,ActivationTime,RatingPlanId,RatesFallbackSubject
cgrates.org,call,*any,,RP_MainSubj,RP_Special_Subj1
cgrates.org,call,RP_Special_Subj1,,RP_FBSubj1,`
*Using special naming for RatesFallbackSubject can make it more convenient, helping you clearly define and identify them.
Thanks,
Armir