1. Is TNT, Take Back And Transfer, supported in IOS voice gateway in general?
2. If yes, is there any specific IOS configuration needed at the voice gateway?
(I do not see any need as the DTMF digits(-tones) will be sent in-band as in normal voice stream to the PSTN (which supported/subscribe to TNT).
Please advise. thanks
No need to configure anything for TNT as the transfer DTMF sequence is sent inband.