It works at voice frequencies so there is no reason it wont work for BRA!
I thing most countries are accepting ETSI standards for ISDN, I know Australia (developed their own before the ETSI standards were complete. WE have now completely dropped the local BRA standard and the local PRA standard remains in use for older equipment where manufacturers will not develop/upgrade to ETSI.
Thanks Frank, an interesting discourse and I’ve learnt something new.