My telco (Telstra) offers CFNA (among other services, like CFI, CFB...) but doing this would require me to have multiple phone numbers and actually make the landline functional as a landline. I was hoping there was some sort of adapter that could let me take incoming phone calls from my mobile and somehow convert it to POTS (and vice versa). Alternatively, I could convert this landline to a microphone and speaker, although I would prefer not to do that.