I recently bought a Cisco SPA112 analogue telephone adapter (ATA) in 
anticipation of migrating to the NBN.  It seems to be very good quality and 
flexible, certainly better than the average integrated modem & VoIP device, but 
it's intended to be deployed en-masse almost anywhere by telephony specialists.

So if an ordinary user wants to configure it for Australia, they have to 
research every detail, including a suitable dial plan, standard Oz tone & 
cadence definitions, ring cadence, even low-level electrical characteristics 
such as ring voltage and FXS port impedance.  (Have Link engineers ever seen an 
impedamce specified as "820+220||120nF"?  It actually describes an equivalent 
circuit.) 

However I've now found most of this stuff and can pass it on if anyone is 
interested.

David L.
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